PHILADELPHIA -- Catcher Carlos Ruiz was scratched from the lineup for Triple-A Lehigh Valley in a rehabilitation game Monday night.

Ruiz took batting practice, but felt discomfort in his strained right oblique. He will be re-evaluated Tuesday.

Ruiz, who caught nine innings Sunday for the IronPigs, added a hit and a pair of walks.

He was placed on the disabled list April 11 and was scheduled to catch Tuesday for Double-A Reading. But that appearance and his exact return to the Phillies are unclear at this point.

Rookie Lou Marson got the start Monday night against the Nationals.