Tweaking his left hamstring Sunday in Toronto, Beltre resumed his spot at the hot corner, with manager Terry Francona keeping a watchful eye on him.
"He's certainly not 100 percent," Francona said. "I think what were hoping is we can get the production out of his bat, and if we need to pinch-run for him later, we certainly would."
Beltre had a preliminary MRI exam done Thursday, with reports showing no damage to the hamstring.
"It's not perfect and we recognize that; he's not going to be perfect tomorrow," Francona said. "He hasn't felt perfect for a while, but he's been a pretty good player. But the hope is again to get the production out of his bat."