James Calvin "Jimmy" Rollins (born November 27, 1978 in Oakland, California), nicknamed "J-Roll", is an All-Star and former MVP shortstop for the Philadelphia Phillies of Major League Baseball.

Though Rollins has developed into a five-tool player during his career due to significant increases in his power hitting, he is perhaps best known for his baserunning skills. He has stolen at least 20 bases every season since 2001, with a career high of 47 in 2008. This emulates Rollins' childhood baseball hero, Rickey Henderson.

Rollins comes from an athletic family. He grew up watching his mother play competitive fastpitch softball, and credits the experience for helping him develop a cerebral approach to the game; he has been described as having "a near-photographic memory of games and at-bats and pitches".