Best players by number in St. Louis Cardinals history: 69-60
64. Trevor Rosenthal
Trevor Rosenthal, who helped the Cardinals to the 2013 World Series wearing No. 26 and earned MVP votes a spot on the All-Star team wearing No. 44, began his career wearing No. 64, rocking the high digits as he broke into the big leagues in 2012. He pretty clearly delivered the best performance out of seven players who have worn the number, posting a 2.78 ERA with a 0.93 WHIP in 22 2/3 innings of relief as a rookie. He also threw 8 2/3 scoreless innings of relief during that postseason as the Cardinals advanced to the NLCS, allowing just two hits and two walks while striking out 15.