The Marlins optioned Groshans (shoulder) to Triple-A Jacksonville on Sunday, Jordan McPherson of the Miami Herald reports.
Groshans' bid for a spot on the Marlins' Opening Day roster may have been derailed by a left shoulder injury that sidelined him for two weeks earlier this month, but he returned to Grapefruit League action Friday and Saturday, going 0-for-2 between those games while also seeing some time in the field at third base. He'll ultimately head to Triple-A to continue playing on an everyday basis, but Groshans could be first in line for a promotion if the Marlins are without one of their regulars in the infield for any period of time this season.