May 16:
Chamberlain (oblique), who made his first rehab appearance Wednesday, will throw at least once more in the minors before rejoining the Yankees, MLB.com's Bryan Hoch reports.

May 13:
Chamberlain (oblique) threw a 30-pitch bullpen Sunday, and now will head to Triple-A for one or two rehab outings, the New York Post reports.

May 12:
Chamberlain (oblique) will throw a 30-pitch bullpen Sunday, and could progress to pitch for Triple-A Scranton/Wlikes-Barre Tuesday with an eye toward coming back to the majors Thursday, the New York Post reports.

May 10:
Yankees manager Joe Girardi is hopeful Chamberlain (oblique) can return from the DL when eligible Monday, the Star-Ledger reports.

May 02:
Chamberlain was placed on the 15-day disabled list on Thursday retroactive to April 28 with a strain in his right oblique, according to the New York Daily News.

Apr 27:
Despite giving up a pair of singles, Chamberlain was able to hold the Blue Jays scoreless in the ninth inning of Saturday's game en route to his first save of the season.

Jan 17:
Chamberlain agreed to a one-year, $1.875 million deal with the Yankees on Thursday, avoiding arbitration.

Jan 16:
Chamberlain filed for arbitration on Tuesday, the Yankees' official site reports.

Oct 12:
Chamberlain left Thursday night's Game 4 in the 12th inning with a bruised right elbow when he was hit by a broken bat following a Matt Wieters swing, the Associated Press reports.

Sep 03:
Chamberlain gave up two runs in Sunday's game, and his ERA now sits at 10.57 on the year.

Aug 21:
Chamberlain's spot on the major league roster could be in jeopardy when CC Sabathia returns from the DL on Friday, the New York Post reports.

Aug 02:
Chamberlain was shaky in his return to the majors on Wednesday, giving up two runs on four hits over 1.2 innings of work against Baltimore.

Jul 31:
Chamberlain (ankle) was activated from the disabled list Tuesday, MLB.com reports.

Jul 30:
Chamberlain (ankle) will have another rehab outing in Double-A Trenton on Tuesday, Anthony McCarron of the NY Daily News reports.

Jul 28:
Chamberlain (ankle, Tommy John surgery) threw a bullpen session on Friday, and after an appearance with Double-A Trenton on Sunday could be back in the majors as soon as next week, the New York Post reports.

Jul 26:
Chamberlain (ankle) will throw a bullpen Friday, and then pitch for Double-A Trenton on Sunday, Mark Feinsand of the New York Daily News reports.

Jul 25:
Chamberlain (ankle) threw a scoreless inning in a rehab appearance with High-A Tampa on Wednesday.

Jul 23:
Chamberlain (ankle, Tommy John surgery) threw a bullpen on Sunday, will work in games Tuesday and Wednesday, then if all goes well will make one more minor league appearance before returning to the Yankees, the New York Post reports.

Jul 21:
Chamberlain (ankle, Tommy John surgery) threw another rehab outing on Friday, will throw a bullpen on Monday, and will then try to pitch in back to back games with hopes of returning to the Yankees before the end of July, the New York Post reports.

Jul 18:
Chamberlain (ankle, Tommy John surgery) struck out two in a perfect inning for the Gulf Coast League Yankees on Tuesday, and will throw two innings for High-A Tampa on Friday, the New York Post reports.

Jul 15:
Chamberlain (ankle, Tommy John surgery) pitched two scoreless innings in his second rehab outing with the Gulf Coast League Yankees on Saturday, and is targeting a return to the majors in early August, the New York Post reports.

Jul 10:
Chamberlain (ankle) began his rehab assignment with the Gulf Coast League Yankees on Tuesday, the New York Newsday's Twitter feed reports.

Jul 06:
Chamberlain (ankle) could start a rehab assignment as early as Tuesday, Marc Carig of the Star-Ledger reports.

Jul 02:
Chamberlain will pitch in a simulated game Friday, WFAN's Sweeny Murti reports.

Jun 14:
Chamberlain (ankle, Tommy John surgery) threw on flat ground on Wednesday, and believes he is 2-3 weeks away from going on a minor league rehab assignment, the New York Daily News reports.

Jun 08:
Chamberlain threw for the first time since dislocating his right ankle, MLB.com reports.

Jun 03:
Chamberlain (ankle) threw off a half-mound on Saturday, and manager Joe Girardi still believes that Chamberlain will return in the 2012 season, the New York Post reports.

May 03:
Chamberlain (ankle) was moved to the 60-day DL Thursday, the NY Daily News reports.

Apr 20:
Chamberlain (ankle) expects to be out of a walking boot in about two weeks, the Associated Press reports.

Apr 05:
Chamberlain (Tommy John surgery, ankle dislocation) has been placed on the 15-day DL retroactive to March 26, the Yankees' official site reports.

Mar 26:
Chamberlain (ankle) will be in a cast for six weeks, then will wear a weight-bearing boot to continue his recovery, the New York Daily News reports.

Mar 25:
Chamberlain (ankle, Tommy John surgery) still thinks he can be back on a mound in July to resume his rehab, but there remains a chance that Chamberlain's injuries could be season-ending or even career-ending, the New York Post reports.

Mar 23:
Chamberlain, making his way back from Tommy John surgery, suffered an ankle injury recently that will likely cost him the entire 2012 season, the Star-Ledger reports.

Mar 09:
Chamberlain (elbow) completed a 30-pitch workout Thursday, finishing with one curveball and five sliders, the New York Post reports.

Mar 03:
Chamberlain (elbow) threw 25 pitches in the bullpen on Friday, and now plans to consult Dr. James Andrews to plan out the next steps in his recovery, the New York Post reports.

Feb 28:
Chamberlain (elbow) threw 16 pitches off a full mound Tuesday, Jack Curry of the YES Network reports.

Feb 22:
Chamberlain (elbow) threw of 1/2 mound Wednesday and expects to throw off a real mound next Tuesday, Marc Craig of the Star-Ledger reports.

Feb 18:
Chamberlain (elbow) threw in the bullpen Friday, the Newark Star Ledger reports.

Feb 04:
Chamberlain threw off a half-mound at the Yankees' complex on Friday, the New York Post reports.

Jan 18:
Chamberlain signed a one-year, $1.675 million deal with the Yankees, the team's official site reports.

Dec 13:
The Yankees tendered Chamberlain a contract, and he is eligible for arbitration, the Yankees' official site reports.

Oct 15:
Chamberlain (Tommy John surgery) was reinstated from the 60-day DL on Thursday, the Yankees' official site reports.

Sep 22:
Chamberlain will play catch on Wednesday for the first time since his Tommy John surgery, the New York Daily News reports.

Jun 30:
Chamberlain is encouraged so far in his recovery from Tommy John surgery, the New York Daily News reports.