One intriguing thing about the PBA50 Tour each season is the newest crop of ‘rookies’ — players who have turned 50 and become eligible to compete. The focus usually is on PBA Tour stars like Pete Weber, Amleto Monacelli and Parker Bohn III. But this season, there is a rookie sure to draw plenty of fan interest who was a star — just not in bowling. Former major leaguer John Burkett pitched for the San Francisco Giants, Florida Marlins, Texas Rangers, Atlanta Braves and...