Mason Melotakis still felt something with his strained oblique when he threw on flat ground Saturday.
David Peralta said Saturday that his surgically-repaired right wrist feels "great."
Josh Harrison is open to filling a utility role for the Pirates.
Shawn Tolleson (back) was held out of Saturday's workout for "preventative" reasons.
The Diamondbacks are expected to go with three catchers on their Opening Day roster.