BOSTON -- Mark Teixeira has braced for the reality that he will miss most of the remaining Yankees' regular-season schedule, but he does not regret pushing his strained left calf in an attempt to get back into the lineup.

"I'm obviously disappointed," Teixeira said. "I don't want to miss any time, but it is what it is. I can't really change it, so we'll just keep working hard and try to get out there as soon as possible."

After sitting out for 10 games, Teixeira tried his luck in the lineup and reinjured his calf trying to beat out a ninth-inning double play at first base in Saturday's 5-4 loss to the Orioles.

An MRI exam taken on Monday in New York revealed that Teixeira had irritated his original Grade 1 strain, and the Yankees said that Teixeira is now forecast to miss a minimum of 10-14 additional days.

"It's pretty much what I expected," manager Joe Girardi said. "I saw him after the game [on Saturday] and he was limping a little bit an hour after the game. It kind of reminded me of what he was going through when he first hurt it. I expected it to be probably two weeks."

Teixeira said that he thought his calf was better than 80 percent when he returned to the lineup, and that the new injury means he will have to be more careful about trying to hurry back. Teixeira said he can continue to travel with the team, and he is currently limited to icing and ultrasound treatment.

"A calf doesn't seem like it's something that you can play on 80 or 90 percent," Teixeira said.

With Teixeira out, the Yankees plan to have Nick Swisher play first base against right-handed pitching and Steve Pearce in the lineup against lefties. Teixeira is hopeful that he will be available for any potential Yankees postseason games, but he said there are no guarantees.

"I'm confident that I'm going to work as hard as I can to try and play again," Teixeira said. "I really have no idea. I wish I had the crystal ball to tell you when I could play. I just don't have it."

Yankees pause to remember those lost on 9/11

BOSTON -- On the September morning that changed the world 11 years ago, Joba Chamberlain was still a sophomore at Lincoln Northeast High School in Nebraska, carrying his notebook into Miss Smith's Spanish class.

"We were walking into class and people started saying something," Chamberlain said. "Obviously no one really knew what was going on. We all went down to the auditorium, and they had TVs set up, and we saw the second plane hit the World Trade Center."

Chamberlain had no way to know that he'd one day wear "New York" across his chest; in fact, he'd never even been on an airplane. But the future Yankees reliever, like most everybody else, vividly remembers the emotional flood that accompanied the worst terrorist attack in United States history.

"We were all making phone calls and trying to figure out what was going on the rest of that day," Chamberlain said. "There were so many rumors, like that gas was going to go up to $9 a gallon. My dad was out there directing traffic for the gas station. You obviously didn't know what was going on."

More than 500 miles east, manager Joe Girardi was living in Chicago at the time, then a member of the Cubs. He said that he was in his family room that morning with his wife Kim and their daughter Serena.

"A friend in New York called us and said, 'You've got to turn on the TV. You're not going to believe what's happening,'" Girardi said. "And I was in shock. I was scared. I was sad.

"It was a terrible day. I had the TV on all day. At 7 o' clock, I finally said, 'You know what? I've got to take a walk outside to get some fresh air and think about what's going on.' You could hear fighter jets flying over near O'Hare Airport. It was a scary, scary day."

In New York, Derek Jeter checked his messages that morning and found a voice mail from teammate Jorge Posada, asking if the Yankees' game that night would be cancelled. Jeter flicked on his television and saw that the Manhattan skyline had been forever altered.

Once baseball resumed, Jeter recalled an "uncomfortable" feeling. Many in the wounded city looked to him and his teammates for diversion and inspiration; as workers at Ground Zero huddled around radios to listen to game broadcasts, the Yankees charged through the postseason and battled the D-backs in an epic seven-game World Series.

"We'd been a part of a lot of big games over the years, but that was probably the loudest I heard Yankee Stadium," Jeter said. "We gave New Yorkers something to cheer for."

Cleared to run, Pettitte will throw simulated game

BOSTON -- Andy Pettitte has been cleared to resume running, and the left-hander is looking forward to taking his next step forward with a simulated game on Wednesday at Fenway Park.

Pettitte is expected to throw about 60 pitches as he attempts to come back from a fractured left ankle, and he believes that if it goes well, the Yankees could have him make his next appearance in a big league game.

"I think there's a chance," Pettitte said. "It's just a matter of what they want to do. As far as I'm concerned, I feel like I would be ready. I want to. I want to go ahead and just pitch, try to help. Obviously it's not up to me. It's up to them to make that decision."

If Pettitte makes it through his 60 pitches healthy, the next jump would be to the area of 75 to 80 pitches. Pettitte said he did some light running at Yankee Stadium on Monday and performed pitchers' fielding practice.

"I knew they were never going to let me pitch unless I was able to start covering first base and moving around the field," Pettitte said.

Manager Joe Girardi said that the Yankees would have to talk about Pettitte's next step after the 60-pitch outing, but he didn't rule out the idea of getting Pettitte into a big league game.

"I think it depends on how he feels, how his leg feels after going 60 pitches; if we feel he's ready to compete in a game, if we feel he can move around enough to compete in a game," Girardi said. "But it's conceivable."

Bombers bits

• Outfielder Melky Mesa has been added to the Yankees' big league roster. Mesa, 25, combined to bat .264 with 23 home runs and 67 RBIs in 121 games between Double-A Trenton and Triple-A Scranton/Wilkes-Barre.

• Right-hander Ivan Nova threw a simulated game on Tuesday at Fenway Park, and Girardi said that he thought Nova looked good. If Nova feels fine on Wednesday, Girardi said the Yankees would make a decision about his next step.

• On this date in 2009, Jeter broke Lou Gehrig's all-time franchise mark of 2,721 hits with a single off the Orioles' Chris Tillman at Yankee Stadium. Gehrig had held the mark since Sept. 6, 1937.