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05/18/10 12:24 AM ET

Strained left bicep sidelines Swisher

Outfielder to test out swing from left side of plate Tuesday

NEW YORK -- Nick Swisher was out of the Yankees' lineup again on Monday night as he continues to rest his strained left bicep. Swisher has been limited since Wednesday, making only two starts in right field -- and he left one of those after three innings.

The injury has prevented Swisher from batting from the left side without pain. He has not taken a left-handed swing since leaving Friday's game after one at-bat against Minnesota's Scott Baker. Swisher's start on Saturday came against southpaw Francisco Liriano, and he stayed in the right-handed batter's box against righty Jesse Crain later in the game.

Swisher has been undergoing treatment over the past several days, saying the bicep continues to improve. He remains available to play defense or pinch-hit from the right side.

"We've got a couple other guys who are banged up and you don't want to be the next guy on the list," Swisher said. "At this stage, if we get back in there too early, you do become one of those guys. And that's the last thing I want to do. This season means way too much and we've got way too great of a team."

Swisher originally felt pain in his bicep earlier in the season, but it quickly went away. It came back on Wednesday in Detroit, and it has stuck around a little longer this time.

"It happened, and then it went away, and then it came back, and that's what sparked, 'Can we look at this thing a little more?'" Swisher said. "I've played my way through little injuries before, but when you're talking about a muscle, and the possibility of that muscle not being together as one, that's scary for me."

The strain bothers Swisher most on swings and misses, which he said is a good thing.

"Make contact every time and it won't hurt," he joked.

The plan is for Swisher to test his swing from the left side before Tuesday's game with the Red Sox. If all goes well, he could be back in the lineup against Josh Beckett. If not, it will mean another few days before being limited to the right side before he can test it again. The Yankees do not face a left-hander until at least Friday.

-- Tim Britton

Posada held out of opener with foot injury

NEW YORK -- Jorge Posada was kept out of the Yankees' lineup on Monday against the Red Sox with a right foot injury and is considered day-to-day.

Yankees manager Joe Girardi said that Posada had X-rays taken after a foul ball hit his right foot during Sunday's 6-3 loss to the Twins. The X-ray was clean, but Posada is sore with what Girardi called "a knot" on his foot.

Francisco Cervelli instead drew the catching assignment, receiving starter Phil Hughes and batting sixth.

Outfielder Nick Swisher was also out of the lineup again due to the strain in his left bicep that keeps him from facing right-handed pitchers. Marcus Thames started in right field.

Girardi said that Swisher would be available to pinch-hit Monday against a left-hander, but that the Yankees will continue to treat Swisher cautiously.

"We don't want this to be something huge," Girardi said.

Coming off DL, Park struggles vs. Boston

NEW YORK -- Chan Ho Park was roughed up by the Red Sox in his first time back on the mound after being activated from the 15-day disabled list on Monday. Park allowed three runs on back-to-back homers by Kevin Youkilis and Victor Martinez in one-plus innings.

Park said he felt fine coming back, but that he simply made a pair of mistakes.

"Those pitches, I missed my location," said Park, who was spared a loss when the Yankees rallied for an 11-9 victory. "The first home run was a slider. The second home run was a fastball. I was really trying to pick up the target and throw strikes. They hit it good."

Park gave up all three runs in the eighth after submitting a scoreless seventh. The right-hander said he had no problems working a second inning with the Yankees' bullpen a little short.

Park had been placed on the disabled list on April 16, retroactive to April 14, with a right hamstring strain that forced him to miss 30 games.

He made rehab appearances in an extended spring game on Wednesday, striking out three batters and allowing a hit, and for Triple-A Scranton/Wilkes-Barre Friday, tossing a scoreless inning with a hit, two strikeouts and a wild pitch.

"I felt very normal and strong," Park said. "That's why I'm ready to pitch. I felt good about running and stretching and exercise. It's pretty good."

The Yankees optioned right-hander Ivan Nova to Triple-A Scranton/Wilkes-Barre. Nova had a 0.00 ERA in his first two Major League appearances, hurling three innings of scoreless four-hit ball with one strikeout and no walks.

-- Tim Britton

Bryan Hoch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.