After using just a 24-man roster during the Red Sox's 7-3 victory over the Rays on Sunday, manager Terry Francona said Hansen will be in Boston's bullpen Monday when it opens a four-game series vs. the Tigers.
The Red Sox formalized the move on Monday when Hansen was recalled from Triple-A Pawtucket and Moss was placed on the 15-day disabled list, retroactive to Saturday.
Moss was expected to be released from the hospital less than 24 hours after undergoing surgery and could be jogging "in four or five days," said Francona.
With Moss gone and Jacoby Ellsbury then forced into Sunday's starting lineup when David Ortiz was a late scratch because of right knee tightness, shortstop Julio Lugo was the emergency outfielder. He had made one appearance in the outfield this year for the Red Sox and made three for the Dodgers in 2006.
"It's one game. We just don't want to get into a situation where we call somebody up, something happens, we have to option somebody, then there's the 10-day [rule]," Francona said during his pregame media briefing. "I think we're better off waiting until the end of today."
Because the bullpen was in good shape, the Red Sox didn't need to add a pitcher for Sunday's game, either, taking care of that after the game and going with Hansen over a position player because of the talented Detroit lineup that includes a load of righty power.
Francona said before the game Moss was about to be released from the hospital, "which is unbelievable to me.
"He's doing OK. They did the procedure last night and he's going to get checked out and head probably to his apartment in about an hour. We're still trying to sort out what's in his best interests -- probably let him go home for 10 days and then maybe to Florida to ramp back up, just depending on the timetable, how he's doing."
Moss wasn't feeling well on Friday, when he had two hits, including his second career home run, scored two runs and had an outfield assist in the Red Sox's 7-3 victory vs. the Rays. He wasn't feeling well when he got to the ballpark Saturday and was sent to the hospital as a precautionary move. Surgery was performed during Boston's 12-4 victory and the Red Sox reported after the game Moss was out of surgery and doing well.
Moss is batting .286 with two homers and three RBIs in six games with the Red Sox. He started the season with the team in Japan, was sent to Pawtucket and recalled April 26.
Mike Shalin is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.