11:56am: Chamberlain's deal includes $500K in performance bonuses based on games pitched that would bring his salary up to $3MM, tweets Jason Beck of MLB.com.

10:35am: Having already added Joe Nathan to solidify the ninth inning, the Tigers made an upside play by adding right-hander Joba Chamberlain to the mix. The Tigers today officially announced the signing of Chamberlain to a one-year deal that is reportedly worth $2.5MM plus incentives. Chamberlain is represented by Jim Murray of Excel Sports Management.

The 28-year-old former top prospect struggled through his worst season (in terms of ERA) as a Major Leaguer in 2013, posting a 4.93 ERA with 8.1 K/9, 5.6 BB/9 and a 41.5 percent ground-ball rate in 42 innings for the Yankees. Chamberlain was significantly better away from Yankee Stadium, posting a 3.54 ERA on the road compared to a 6.23 mark at home in a roughly equal sample size. Chamberlain's velocity remained strong in his first full season back from 2011 Tommy John surgery, as he averaged a healthy 94.7 mph on his fastball.

Chamberlain will join a new-look Tigers bullpen that features active saves leader Joe Nathan in the ninth inning. Joaquin Benoit is on the free agent market but doesn't appear likely to return, and left-hander Drew Smyly figures to shift from the 'pen into the rotation following the offseason trade of Doug Fister to the Nationals. Left-hander Ian Krol, acquired in the Fister deal, should join Nathan and Chamberlain as new additions.

Further additions seem unlikely, as GM Dave Dombrowski told Lynn Henning of the Detroit News on Thursday that his offseason shopping was mostly done, save for one bullpen arm that "won't be a biggie" (Twitter link).

Tim Brown of Yahoo Sports first tweeted that the Tigers were a possible landing spot for Chamberlain. ESPN's Buster Olney reported (via Twitter) that the Tigers' interest was "serious," and Ken Rosenthal of FOX Sports reported that a one-year agreement was in place (Twitter link). Olney then reported news of the $2.5MM guarantee plus incentives (on Twitter).