Mark Teixeira says he has a partially torn tendon sheath in his right wrist and didn't rule out missing up to two months of the regular season.The first baseman rejoined the New York Yankees at spring training Sunday after getting hurt March 5 while with the U.S. team at the World Baseball Classic. The injury initially was announced as a strained wrist.“The tendon is fine,” Teixeira said. “That's the good thing. It's the sheath that holds the tendon over. … It's the little covering that holds the tendon in place. When you rotate your wrist, that tendon will snap in and out if the sheath is gone, and so the tendon sheath just got damaged a little bit, and we just want to make sure that the tendon is sitting in the groove right and it's stable. If that doesn't heal, then the tendon has a chance to get damaged, and you really don't want that.”Teixeira plans to start limited baseball drills in about a week and is optimistic that surgery will not be necessary.He was hurt while swinging a weighted bat left-handed off a tee in an indoor cage during pregame warmups with the U.S. at the World Baseball Classic. The Yankees have said Teixeira will be out until at least May.“The good thing is it's nothing major, nothing where I'm missing a whole season,” Teixeira said.Teixeira is not blaming his national team participation for the injury.“It has nothing to do with the WBC,” he said. “It would be one thing if we weren't playing games. We started playing games on the 23rd of February. February 23rd, think about it.”Briefly• Mets: David Wright wanted to make it clear that playing in the World Baseball Classic had nothing to do with the rib injury that could cause him to miss Opening Day for the Mets. “You can get hurt in spring training. You can get hurt before spring training,” Wright said Sunday. “Playing baseball, there are some risks that comes along with that, whether it’s in Port St. Lucie, Arizona or Miami.” Mets manager Terry Collins has expressed concern that Wright will not be ready for Opening Day.• Astros: Chris Carter had two home runs and five RBIs, leading Houston over Toronto 11-2. Carter hit two-run homers in the third and fifth innings against Brandon Morrow, raising his spring training total to four. He also hit into a run-scoring forceout in the first. Houston’s Bud Norris allowed three hits and struck out five in six innings.• Phillies: Roy Halladay left after one inning because of a stomach virus in Philadelphia’s 5-3 win over a Baltimore split squad. Halladay allowed one hit and a walk. He was sweating profusely when he was pitching and at one point bent over behind the mound.• Red Sox: Jon Lester pitched six perfect innings and combined with his bullpen to hold Tampa Bay without a base runner until one out in the ninth, leading Boston to a 5-1 victory. Jason Bourgeois reached on an infield hit to second baseman Jonathan Diaz in the ninth against Marco Duarte, Boston’s fourth pitcher. Bourgeois advanced on Christian Vazquez’s two-out passed ball and scored on Cole Figueroa’s double. Lester, Boston’s projected opening-day starter, struck out six and threw 53 of 79 pitches for strikes. He allowed allowed two runs, six hits and four walks over five starts and 20 innings, striking out 16.• Dodgers: Zack Greinke threw off a mound for the first time since Los Angeles right-hander was shut down March 11 with inflammation in his right elbow. Greinke threw 38 pitches Sunday and said he felt good. The session was his first since his right elbow was injected in Los Angeles with plasma rich in platelets. He said he threw all of his pitches.Greinke, who signed a six-year, $147 million contract Dec. 9, is projected to be the Dodgers No. 2 starter. But it’s not clear whether he’ll be ready for his first scheduled start April 2 against San Francisco at Dodger Stadium.