Gelb suggests that Marsh (who had an .867 OPS against lefties in limited PAs after August 1) should just play every day to finally see if he can do it, which would further marginalize Rojas and leads to this suggestion:
• Edmundo Sosa’s outfield adventure this spring will include center field, Thomson said. Sosa is working with the infielders most days but is dedicating some practice time to the outfield group. If Sosa can prove he’s capable in the outfield this spring, that could prompt the Phillies to carry a different bench bat over Rojas. Something to monitor.
Seems unlikely they'd actually want Sosa to make CF starts though. If they really wanted Rojas to play every day in AAA they could add Mercado.