SARASOTA, Fla. — The infielders keep dropping for the Phillies, who lost Michael Martinez when he fractured a bone on his right foot Tuesday.

Martinez was hit by a pitch in the seventh inning of a 4-1 Phillies victory over Baltimore and was wearing a walking boot after the game. Following X-rays, the Phillies said he fractured the fourth metatarsal in his right foot, and did not provide a timetable for his return.

After being plunked, Martinez was examined by head athletic trainer Scott Sheridan but stayed in the game. He scored on a Freddy Galvis triple but was limping from third to home plate.

"I was hurting," Martinez said.

The Phillies could now be without their utility infielder for the start of the season. They reassigned infielder Kevin Frandsen after the game, leaving only Jimmy Rollins and Freddy Galvis as those who can play shortstop in camp.

Pete Orr and Hector Luna remain in camp as nonroster invitees.

Martinez was hitting .323 (10 for 31) with three doubles in Grapefruit League play.

Contact Matt Gelb at mgelb@phillynews.com or follow on Twitter @magelb.