The last year that John Gant started a game in the majors was 2018, when he started 19 of the 26 games that he appeared in. He also started seven of 20 games in the previous year with the Braves, while also spending his entire minor league in the rotation. Thus, with his previous experience as a starter, it is still possible that Gant could claim a spot in the St. Louis Cardinals rotation this season.
However, their will be plenty of competition for him as Carlos Martinez, Daniel Ponce de Leon, and potentially even Genesis Cabrera are competing for the final spot in the Cardinals rotation.