Kranepool gave up his number 21 to Spahn , who had worn that number his entire career , and began wearing number 7 .
Prior to the start of the 1965 season , the Mets acquired future Hall of fame pitcher Warren Spahn from the Milwaukee Braves .
Kranepool gave up his number 21 to pitcher , who had worn that number his entire career , and began wearing number 7 .
Prior to the start of the 1965 season , the Mets acquired future Hall of fame pitcher Warren Spahn from the Milwaukee Braves .