St. Louis Cardinals pitcher Chris Carpenter (29) is greeted by Cardinals Hall of Famers (L to R) Red Schoendienst, Lou Brock, Bruce Sutter, Ozzie Smith and Bob Gibson during Opening Day ceremonies before the MLB game against the Pittsburgh Pirates' in St Louis in this April 6, 2009 file photo. Separated by a distance of sixty feet, six inches, Hall of Fame pitcher Bob Gibson and Hall of Fame hitter Reggie Jackson were once natural enemies. In retirement, however, the two share a mutual respect, a love of the game and 38 seasons of insight in "Sixty Feet, Six Inches," a collaborative book about baseball at the highest level. To match feature BASEBALL/ENEMIES REUTERS/Peter Newcomb/Files (UNITED STATES SPORT BASEBALL)