SUNRISE, Fla. -- Tim Thomas is officially back in the NHL.

The Stanley Cup-winning goalie signed a one-year contract Thursday with the Florida Panthers, a move that was expected for several days. A source told ESPN.com's Pierre LeBrun the deal could be worth up to $3.75 million if he reaches all his bonuses.

The 39-year-old Thomas took last season off, then decided he was ready to return to hockey.

His signing is part of a busy week for the Panthers. The team will introduce Vincent Viola as its new owner Friday, a source confirmed to LeBrun.

Thomas has played in 378 NHL games, all with the Boston Bruins. He's stopped 92 percent of the shots he's faced and has a 2.48 goals-against average. He led the Bruins to the 2011 Stanley Cup and won the Vezina Trophy in 2009 and 2011.

Information from The Associated Press and ESPN.com's Pierre LeBrun was used in this report.