BALTIMORE (AP) — Boston Red Sox designated hitter David Ortiz will be placed on the 15-day disabled list with a partially torn tendon in his left wrist, manager Terry Francona said Monday night.

Ortiz hurt his wrist while swinging at a pitch Saturday night in a game against the Baltimore Orioles. He missed Sunday's game, then left the team for Boston, where he underwent an MRI on Monday.

The injury was determined to be a torn ECU tendon shead.

"Surgery is very unlikely," Francona said. "We'll certainly have more information (Tuesday).

The move to place Ortiz on the disabled list will occur Tuesday, Francona said, and Boston will recall right-hander Justin Masterson from Triple-A Pawtucket to fill Ortiz's spot on the roster. Masterson will start Tuesday night against Tampa Bay.

The Red Sox were hopeful Ortiz would not be gone for long.