Veteran in Superstar Baseball appears to start at level 25 and runs through level 99 ; level 100+ is listed as Pro in the related Roblox sports-league info I found, and the game page confirms Superstar Baseball is the Roblox experience in question.

Quick Scoop

  • Level 1–4: Beginner.
  • Level 5–9: Novice.
  • Level 10–24: Rookie.
  • Level 25–99: Veteran.
  • Level 100+: Pro.

Note

The clearest public breakdown I found is from a Roblox sports-game leveling guide, while the Superstar Baseball game listing confirms the game itself. If you meant a different “Veteran” label inside a specific mode, event, or rank system, that could use a separate answer.