Throughout its long and celebrated history in baseball, the knuckleball has vexed many hitters.It's vexed plenty of catchers, too. And on Aug. 30, 1987, Rangers catcher Geno Petralli had one of the toughest days in MLB history. That was the day when Charlie Hough's knuckleball dipped and dived enoughto allow Petralli to tie adubious record six pa sed balls in one game. MORE: Here's the...