Martinez, who was hit on that left big toe in the bottom of the second inning by a Jason Bartlett foul ball, was forced out of the game in the top of the third. After drawing a walk, he couldn't even trot to first base, going down the basepath in an all-out limp. Jason Varitek came on to pinch-run.
X-rays proved to be negative.
"It's painful," said Martinez. "It's a lot of pain. The good thing is the X-ray came out negative. Nothing is broken. We'll see how it feels tomorrow. But it's really, really painful."
Varitek will start Tuesday night's game.
"I think it's to the point where I don't think we have to make a roster move," said Red Sox manager Terry Francona. "'Tek catches [Tuesday], obviously. But I think in a pinch, Victor will be available. We'll certainly check with him in the morning, but I think we dodged a bullet there."
According to Francona, Mike Lowell volunteered to be Boston's emergency catcher in the event anything happened to Varitek.
Martinez has been in a groove of late. He had four straight multi-hit games entering Monday, a span in which he went 9-for-17 with four doubles and a homer.