NEW YORK -- The Yankees announced on Friday that they have donated $500,000 to support tornado-relief efforts in the southern U.S.

Of that total, half is going to the Salvation Army, the other half to the Red Cross. Both organizations are working in the affected areas.

"On behalf of the entire New York Yankees organization, we would like to express our deepest condolences to all those affected by the devastating storms in Alabama and throughout the South," said Jennifer Steinbrenner Swindal, Yankees general partner and vice chairperson.

"During the most difficult of times, the resiliency of the American spirit brings people together. We are eager to join so many others in helping to rebuild these proud and vibrant southern communities. In the days, weeks and months ahead, we will continue to keep everyone in our hearts and prayers."

Cervelli activated from 15-day disabled list

NEW YORK -- The Yankees activated catcher Francisco Cervelli from the 15-day disabled list before Friday's game against the Blue Jays.

Cervelli, 25, fractured his left foot with a foul ball in a March 2 exhibition game against the Astros. He had rehab assignments with Class A Tampa and Triple-A Scranton/Wilkes-Barre before heading to New York.

"The difficult part for me was just sitting on the couch," Cervelli said. "I think I'm too hyper, and sometimes you get a little crazy, but it helps you to learn about things about life. I'm here, fresh and ready to play."

Manager Joe Girardi plans to get Cervelli into Sunday's game against Toronto, catching right-hander Ivan Nova.

Cervelli seemed to work well with Saturday's starter, A.J. Burnett, but so has Russell Martin, and Girardi does not want to disrupt that relationship.

"You have to be ready for every pitcher," Cervelli said. "They're all different, but we are a team. It's not just one catcher for one pitcher, it's everybody for everybody. If some guy wants me to catch, I'm happy with that, but I know Russell can do it, because he's great."

In a corresponding roster move, the Yankees optioned Gustavo Molina to Triple-A. Molina went 1-for-6 (.167) in three games for New York, logging his only hit on a bloop double to left field on Thursday.

"I thought Molina did a tremendous job while he was here," Girardi said. "He did not play a lot because of the ways the off-days fell. He did a good job with the staff when he was in there. I was very pleased with him, and we expect the same from Cervy."

Girardi may begin rotating designated hitters

NEW YORK -- The Yankees may be ready to begin giving Jorge Posada some competition for the designated hitter spot.

Manager Joe Girardi sat Posada on Friday against the Blue Jays, as the 39-year-old is hitless in his last 15 at-bats and has just one hit in his last 25 plate appearances.

"I actually thought his at-bats were pretty decent last night, but this is [the] lineup that I chose today," Girardi said.

With Andruw Jones expecting to play against left-handed pitchers, Girardi wants to keep Brett Gardner in the lineup after the speedster showed signs of breaking out of a prolonged skid on Thursday.

Gardner has also had some success against Toronto starter Ricky Romero, entering Friday's game 4-for-9 with a double, home run, four RBIs and two walks against the left-hander.

"We want to keep him going," Girardi said.

Girardi said that he may begin rotating more players in and out of the DH role, especially as the Yankees play in prolonged stretches. He mentioned Alex Rodriguez, Robinson Cano, Curtis Granderson and Nick Swisher as candidates to DH.

"We've said all along, when you get into some situations where you're playing some long stretches, you might see other guys DH a little bit," Girardi said. "We are going to do that because we're [playing] 32 out of 33 days."

Yankee Stadium to host 'The Big 4'

NEW YORK -- Mariano Rivera's famous entrance song will have a live head-banging rendition on the field this September.

The Yankees have announced that on Sept. 14, Yankee Stadium will host "The Big 4" -- a concert event featuring Metallica, Slayer, Megadeth and Anthrax.

A recording of Metallica's "Enter Sandman," of course, blares in the Bronx each time the 41-year-old closer enters a game.

Details regarding the May 6 on-sale date will be released in the near future. Fans are encouraged to visit www.yankees.com/thebig4 for up-to-the-minute information regarding the event.

The concert will take place while the Yankees are in the middle of a three-city West Coast road trip. Last September, Jay-Z and Eminem staged a concert at the Stadium, the first in its history.