Gremminger returned to the Beaneaters in 1903 and again appeared in 140 games. He hit .264 with a .313 on-base percentage and .376 slugging percentage. His 56 strikeouts ranked fourth in the National League. Defensively, he led the National League's third basemen in putouts (217), assists (300), and double plays turned (20). His .935 fielding percentage ranked third among the league's third basemen.
