Bellinger, who leads the majors with a .376 batting average and has 20 home runs, is missing his third game of the season to rest.
Bellinger has played in 58 of 60 games this season, having missed a game in April and one in May. Manager Dave Roberts said it's a normal day off, given Bellinger's work load this season. He has a team-leading 210 at-bats and has played first base and all three outfield positions.
Max Muncy is being held out of Monday's lineup for the same reason. Muncy's 197 at-bats are third-most on the team.
Roberts said he was "trying to get ahead of Cody and Max, keeping them healthy."
Roberts also noted that Bellinger and Muncy are left-handed hitters, and the situation allows right-handed Kike Hernandez and David Freese, both with more at-bats and success against Diamondbacks lefty Robbie Ray, to see action.