New England Patriots head coach Bill Belichick and his girlfriend Linda Holliday smile during a victory parade after winning Super Bowl LIII, in Boston, Massachusetts, U.S., February 5, 2019. REUTERS/Brian Snyder 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots' Quarterback Tom Brady celebrates with New England Patriots head coach Bill Belichick after winning Super Bowl LIII. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots head coach Bill Belichick waves as he holds his granddaughter Blakely, 2, as he celebrates with the Vince Lombardi Trophy after winning Super Bowl LIII. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots head coach Bill Belichick waves as he holds his granddaughter Blakely, 2, as he celebrates with the Vince Lombardi Trophy after winning Super Bowl LIII. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots' Quarterback Tom Brady celebrates with New England Patriots head coach Bill Belichick after winning Super Bowl LIII. REUTERS/Mike Segar 

New England Patriots head coach Bill Belichick smiles during a victory parade after winning Super Bowl LIII, in Boston, Massachusetts, U.S., February 5, 2019. REUTERS/Brian Snyder 

New England Patriots head coach Bill Belichick holds up six fingers, after the team won their sixth title with Super Bowl LIII, during a victory parade in Boston, Massachusetts, U.S., February 5, 2019. REUTERS/Brian Snyder 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots' Tom Brady and New England Patriots head coach Bill Belichick celebrate winning the Super Bowl LIII. REUTERS/Kevin Lamarque 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots head coach Bill Belichick speaks with the media as he celebrates winning the Super Bowl LIII. REUTERS/Kevin Lamarque 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots head coach Bill Belichick with Los Angeles Rams' Brandin Cooks before the match. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. Los Angeles Rams head coach Sean McVay and New England Patriots head coach Bill Belichick before the match. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots head coach Bill Belichick with Los Angeles Rams' Brandin Cooks before the match. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. Los Angeles Rams head coach Sean McVay and New England Patriots head coach Bill Belichick before the match. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots head coach Bill Belichick before the match. REUTERS/Mike Segar 

NFL Football - Super Bowl LIII - New England Patriots v Los Angeles Rams - Mercedes-Benz Stadium, Atlanta, Georgia, U.S. - February 3, 2019. New England Patriots head coach Bill Belichick before the match. REUTERS/Mike Segar 

New England Patriots Head Coach Bill Belichick speaks at a press conference ahead of Super Bowl LIII in Atlanta, Georgia, U.S., January 31, 2019. REUTERS/Mike Segar 

New England Patriots Head Coach Bill Belichick speaks at a press conference ahead of Super Bowl LIII in Atlanta, Georgia, U.S., January 31, 2019. REUTERS/Mike Segar 

New England Patriots Head Coach Bill Belichick speaks at a press conference ahead of Super Bowl LIII in Atlanta, Georgia, U.S., January 31, 2019. REUTERS/Mike Segar 

New England Patriots Head Coach Bill Belichick speaks at a press conference ahead of Super Bowl LIII in Atlanta, Georgia, U.S., January 31, 2019. REUTERS/Mike Segar 

New England Patriots Head Coach Bill Belichick speaks at a press conference ahead of Super Bowl LIII in Atlanta, Georgia, U.S., January 31, 2019. REUTERS/Mike Segar 

New England Patriots Head Coach Bill Belichick speaks at a press conference ahead of Super Bowl LIII in Atlanta, Georgia, U.S., January 31, 2019. REUTERS/Mike Segar 

New England Patriots head coach Bill Belichick speaks to the reporters in the lead up to the Super Bowl in Minneapolis, Minnesota, U.S. January 30, 2018. REUTERS/Kevin Lamarque 

New England Patriots head coach Bill Belichick speaks in front of TV cameras during Super Bowl Opening Night at the Xcel Energy Center in St. Paul, Minnesota, U.S. January 29, 2018 REUTERS/Kevin Lamarque 

New England Patriots head coach Bill Belichick speaks to reporter during Super Bowl Opening Night at the Xcel Energy Center in St. Paul, Minnesota, U.S. January 29, 2018 REUTERS/Kevin Lamarque 

New England Patriots head coach Bill Belichick speaks in front of TV cameras during Super Bowl Opening Night at the Xcel Energy Center in St. Paul, Minnesota, U.S. January 29, 2018 REUTERS/Kevin Lamarque 

New England Patriots head coach Bill Belichick takes the field for their NFL football game against the Carolina Panthers in Foxborough, Massachusetts, U.S., October 1, 2017. REUTERS/Brian Snyder 

U.S. President Donald Trump gives a thumbs up as Head Coach Bill Belichick (L) and CEO of the New England Patriots Robert Kraft watch during an event honoring the Super Bowl champion New England Patriots at the White House in Washington, U.S., April 19, 2017. REUTERS/Joshua Roberts 

U.S. President Donald Trump holds a New England Patriots presented to him by Head Coach Bill Belichick (L) during an event honoring the Super Bowl champion team at the White House in Washington, U.S., April 19, 2017. REUTERS/Joshua Roberts 

U.S. President Donald Trump holds a New England Patriots helmet as Coach Bill Belichick (L) and CEO of the New England Patriots Robert Kraft, watch during an event honoring the Super Bowl champion team at the White House in Washington, U.S., April 19, 2017. REUTERS/Joshua Roberts 

U.S. President Donald Trump shakes hands with Head Coach Bill Belichick (L) and CEO of the New England Patriots Robert Kraft during an event honoring the Super Bowl champion New England Patriots at the White House in Washington, U.S., April 19, 2017. REUTERS/Joshua Roberts 

U.S. President Donald Trump holds up a New England Patriots jersey as Head Coach Bill Belichick (L) watches during an event honoring the Super Bowl champion New England Patriots at the White House in Washington, U.S., April 19, 2017. REUTERS/Joshua Roberts TPX IMAGES OF THE DAY 

U.S. President Donald Trump holds a New England Patriots jersey presented to him by Patriots coach Bill Belichick (L) and team owner Bob Kraft (R) during an event to honor the reigning Super Bowl champions at the White House in Washington, U.S., April 19, 2017. REUTERS/Joshua Roberts 

U.S. President Donald Trump (R) points at New England Patriots coach Bill Belichick (L) during an event to honor the reigning Super Bowl champions at the White House in Washington, U.S., April 19, 2017. REUTERS/Joshua Roberts 

New England Patriots quarterback Tom Brady, head coach Bill Belichick, free safety Devin McCourty, and Defensive coordinator Matt Patricia hoist the Lombardi Championship trophies during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady and head coach Bill Belichick celebrate along with others during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady, head coach Bill Belichick and free safety Devin McCourty, hoist the Lombardi Championship trophies during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady and head coach Bill Belichick (R), hoist the Lombardi Championship trophies during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady and New England Patriots head coach Bill Belichick celebrate during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots head coach Bill Belichick holds up the Lombardi trophies during today's rally at city hall plaza during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady, New England Patriots head coach Bill Belichick, New England Patriots free safety Devin McCourty, Defensive coordinator Matt Patricia hoist the Lombardi Championship trophies during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady and New England Patriots head coach Bill Belichick celebrate during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady, New England Patriots head coach Bill Belichick, New England Patriots free safety Devin McCourty, hoist the Lombardi Championship trophies during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots quarterback Tom Brady, New England Patriots head coach Bill Belichick, hoist the Lombardi Championship trophies during Super Bowl LI victory parade in Boston, Massachusetts, U.S., February 7, 2017. REUTERS/Barry Chin/Pool 

New England Patriots head coach Bill Belichick waves to fans during the Patriots victory parade through the streets of Boston after winning Super Bowl LI, in Boston, Massachusetts, U.S. February 7, 2017. REUTERS/Brian Snyder 

New England Patriots' head coach Bill Belichick (R) is interviewed by broadcaster Terry Bradshaw next to the Vince Lombardi trophy after the Patriots defeated the Atlanta Falcons to win Super Bowl LI in Houston, Texas, U.S., February 5, 2017. REUTERS/Adrees Latif 

New England Patriots' head coach Bill Belichick watches his team warm up before the start of Super Bowl LI against the Atlanta Falcons in Houston, Texas, U.S., February 5, 2017. REUTERS/Adrees Latif

Republican U.S. presidential nominee Donald Trump reads a letter from NFL's New England Patriots Coach Bill Belichick as he rallies with supporters at an arena in Manchester, New Hampshire, U.S. November 7, 2016. REUTERS/Jonathan Ernst 

U.S. President Barack Obama (L) plays host to New England Patriots head coach Bill Belichick (2nd R) and team owner Robert Kraft (R) during a reception to honor the NFL Super Bowl champion Patriots on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

U.S. President Barack Obama (C) arrives with New England Patriots team owner Robert Kraft (L) and head coach Bill Belichick (R), for a reception to honor the NFL Super Bowl champion Patriots on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

U.S. President Barack Obama (R) playfully offers the podium to New England Patriots head coach Bill Belichick (L), as Obama plays host to the reigning NFL Super Bowl champion Patriots on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

New England Patriots head coach Bill Belichick (L) gives a thumbs down to a joke about deflated balls by U.S. President Barack Obama during a reception for the NFL Super Bowl champion New England Patriots on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

New England Patriots head coach Bill Belichick (L) gives a thumbs down to a joke about deflated balls by U.S. President Barack Obama during a reception for the NFL Super Bowl champion New England Patriots on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

U.S. President Barack Obama (C) delivers remarks as he plays host to the reigning NFL Super Bowl champion New England Patriots, including head coach Bill Belichick (front L) and team owner Robert Kraft (front R), on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

U.S. President Barack Obama (C) holds a replica jersey he was given as he plays host to the reigning NFL Super Bowl champion New England Patriots, including head coach Bill Belichick (center L) and team owner Robert Kraft (center R), on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

New England Patriots head coach Bill Belichick (L) gives a thumbs down to a joke about deflated balls by U.S. President Barack Obama (2nd R) during a reception for the NFL Super Bowl champion New England Patriots on the South Lawn of the White House in Washington April 23, 2015. Also pictured is team owner Robert Kraft (R). REUTERS/Jonathan Ernst 

New England Patriots head coach Bill Belichick (L) gives a thumbs down to a joke about deflated balls by U.S. President Barack Obama (R) during a reception for the NFL Super Bowl champion New England Patriots on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

U.S. President Barack Obama (C) holds a replica jersey he was given as he plays host to the reigning NFL Super Bowl champion New England Patriots, including head coach Bill Belichick (L) and team owner Robert Kraft (R), on the South Lawn of the White House in Washington April 23, 2015. REUTERS/Jonathan Ernst 

New England Patriots quarterback Tom Brady holds up the Vince Lombardi Trophy next to head coach Bill Belichick after defeating the Seattle Seahawks in the NFL Super Bowl XLIX football game in Glendale, Arizona February 1, 2015. REUTERS/Brian Snyder (UNITED STATES - Tags: SPORT FOOTBALL)

New England Patriots head coach Bill Belichick's son Steve holds up the Vince Lombardi Trophy after the Patriots defeated the Seattle Seahawks in the NFL Super Bowl XLIX football game in Glendale, Arizona February 1, 2015. REUTERS/Brian Snyder (UNITED STATES - Tags: SPORT FOOTBALL)

New England Patriots head coach Bill Belichick's son Steve holds up the Vince Lombardi Trophy after the Patriots defeated the Seattle Seahawks in the NFL Super Bowl XLIX football game in Glendale, Arizona February 1, 2015. REUTERS/Brian Snyder (UNITED STATES - Tags: SPORT FOOTBALL)