FORT MYERS, Fla. — Red Sox right-hander Josh Beckett has mild concussion symptoms, according to the team, after he was hit in the back of the head on Monday during batting practice before Boston’s exhibition game against the Minnesota Twins at City of Palms Park.

Beckett walked from the field on his own, with trainers at his side. But after being examined by a doctor, he was sent home to rest.

Beckett was in the outfield when coaching staff assistant Ino Guerrero attempted to use a fungo bat to return a ball to the infield. Instead, the ball hit Beckett.

“He’s exhibiting symptoms of a mild concussion,” Manager Terry Francona said. “He’s been evaluated already. We’ll get someone to look at him tonight, and when he comes in tomorrow, we’ll check on him to see what level, if any, of a workout he can do or should do. So, go from there.”

Beckett is coming off a disappointing, injury-riddled 6-6 season, in which he had a 5.78 ERA.

“I think it hit him in the temple,” Francona said. “I bet you it felt like a bolt of lightning. That’s not really what you’re expecting. It’s just a fluke thing. Fortunately, it hit Beckett in the head. It’s better than hitting him in the shoulder.”

• Carl Crawford was 0 for 3 in Monday’s 7-6 win over the Twins. David Ortiz hit a three-run homer and Josh Reddick hit a two-run drive.

Daisuke Matsuzaka allowed one run in two innings. He struck out one and walked one, throwing 14 of 25 pitches for strikes.

YANKEES: Derek Jeter will be doing extra work with hitting coach Kevin Long as he adjusts to a change in his stride at the plate.

The pair are set for an additional session today at the Yankees’ complex. Jeter was not scheduled to make the trip for a spring training game against Pittsburgh.

“We’re going to work even a little bit more than we’ve been working,” Long said after the Yankees were beaten 6-2 by Detroit. “His timing is just a little bit off on the outside pitch. He’s got to wait a little longer on those pitches. And the ones inside, he’s a little late on.”

Jeter is no longer striding with his left foot. He made a smaller adjustment late last season, shortening his stride after a session with Long.

Jeter batted .270 last year, 44 points below his career average.

METS: Carlos Beltran is moving to right field, with Angel Pagan taking over in center.

Beltran told Pagan and Manager Terry Collins that he wanted to make the switch because of his knees. Beltran, a three-time Gold Glove winner, had decreased mobility when he returned last summer following right knee surgery.

A five-time All-Star, Beltran is entering the final season of a $119 million, seven-year contract.

Collins said last week that Beltran would not play during the first week of exhibition games and probably would start out as a designated hitter while the team is able to use one through March 10.

BREWERS: All-Star right fielder Corey Hart is expected to be sidelined for two weeks with a strained lower abdominal muscle on his left side. An NL All-Star in 2008 and 2010, Hart batted .283 with 31 home runs and 102 RBI last season.

ORIOLES: Two days after Justin Duchscherer reported a sore left hip, he was able to throw for a second straight day and told Manager Buck Showalter he was much improved.

MARLINS: Outfielder Mike Stanton said he expects to miss about two weeks because of a strained right quadriceps.