Fox has renewed John Cena’s competition series American Grit for a second season. The first season, which ended June 9, features competitors who split into teams a they take on contests of strength. The season finale drew a 0.7 rating among adults 18-49 in Nielsen live-plus-same day numbers. Producers are also casting now for season two, with David George, Brent Montgomery, Adam Sher, Will Nothacker and Simon Thomas serve as executive producers of “American Grit.” Cena is also an executive producer on the show.