J
- "J-Roll" = Jimmy Rollins, American shortstop
- "Jake" = Mike Jacobs, United States baseball player
- "Jete" = Derek Jeter, American (baseball player) shortstop
- "Jimmy Ballgame"= Jim Edmonds, American (baseball player) center fielder
- "Joltin’ Joe" = Joe DiMaggio, American center fielder
- "Juice" = Jason Giambi, American First Baseman
- "Junior" =
- Jim Gilliam, United States baseball player
- Ken Griffey, Jr., American center fielder
Read more about this topic: List Of Baseball Player Nicknames