Power struggle may weaken Sox right off the bat  —  The division of the Red Sox isn't limited to Saturday's split-squad games against the Miami Marlins and Philadelphia Phillies.  —  A wedge appears to be forming between new manager Bobby Valentine and new general manager Ben Cherington …

Yankees' Joba Chamberlain only has himself to blame for potentially career-ending injury  —  Reliever has long been undisciplined off field  —  Joba Chamberlain burst on the scene and now his pitching career may have met its end.  —  TAMPA — So the Joba Chamberlain star-crossed era …

Elbow injury sidelines Madson for season  —  GOODYEAR, Ariz. — Before he ever got to pitch in a game for the Reds, the season is already over for new closer Ryan Madson.  —  Following an examination in Cincinnati Saturday morning, the club said that Madson's elbow ligament had torn off of the bone.

Chipper Jones to miss start of farewell season  —  Atlanta Braves third baseman Chipper Jones will miss the start of his farewell season.  —  Two days after Jones announced this will be his final year, Braves general manager Frank Wren said Saturday that Jones will undergo arthroscopic surgery to repair torn meniscus in his left knee.

Wise's two-run double lifts Yankees in 10th  —  Ibanez belts two-run homer; Garcia yields one hit in 4 1/3  —  LAKELAND, Fla. — What began as a pitching duel between Max Scherzer and Freddy Garcia ended in extra innings with a Dewayne Wise two-run double in the 10th, sending the Yankees …

Pregame notes: Chamberlain eyeing best-case scenario  —  Joba Chamberlain could be released from the hospital as early as today, and while much of the focus has been on the worst-case scenario for his dislocated ankle, it seems we now have an idea of the best-case scenario.

Yankees might not finalize rotation until the end of spring training  —  New York Yankees manager Joe Girardi said his rotation might not be finalized until the end of spring training.  —  Ivan Nova, Phil Hughes, Michael Pineda and Freddy Garcia are competing for three spots behind opening day starter CC Sabathia and Hiroki Kuroda.

Short-handed Phillies will still be a contender  —  Pitching should overcome injuries to Howard, Utley in NL East  —  Charlie Manuel is talking small ball.  Taking the extra base.  Bunting.  Swiping a bag here and there.  —  Oh, Charlie, has it really come to this?

Fister leaves game with soreness in finger  —  BRADENTON, Fla. — Tigers right-hander Doug Fister left his start Friday against the Pirates in the fifth inning with what the team classified as right middle finger soreness.  He's listed as day-to-day.  —  Fister had retired leadoff hitter Clint Barmes …

Cardinals ace Chris Carpenter out indefinitely  —  JUPITER, Fla.—Chris Carpenter has nerve irritation that has caused weakness in his pitching shoulder and the St. Louis Cardinals' ace will be sidelined indefinitely.  —  The Cardinals made the announcement Friday, after Carpenter was evaluated in St. Louis this week.