Constanza is starting in left field and batting leadoff in Saturday's game against the Reds.
Jason Heyward left Thursday night's game with a strained right hamstring. On Friday night, B.J. Upton (right adductor muscle strain) and Justin Upton (left calf strain) also got hurt.
Manager Fredi Gonzalez says he is confident Heyward can avoid the disabled list. Gonzalez says Justin Upton's injury is "the trickiest" because calf injuries can be nagging.
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