The Washington Capitals announced Monday that defenceman Mike Green will undergo abdominal surgery, and will be sidelined another four to six weeks.
Green has been hampered by a pair of groin injuries that have limited him to just 10 of the Caps' 43 games this season.
The first setback, a strained right groin muscle, cost him 23 games over a stretch from November to January.
Green was eventually cleared to play, but on Jan. 7 - in just the second game into his return - he aggravated his groin injury against the Sharks. He played just over seven minutes before he was forced to leave the game.
The Capitals placed the defenceman on the long-term injured list last Thursday, meaning he would not be eligible to return to the lineup before Feb. 1.
Green has played in just 59 games since the start of the 2010-11 season.
Before the injuries, Green was regarded as one of the top defencemen in the NHL. In the 2008-09 season, he scored 31 goals and added 42 assists. He followed up that campaign with 19 goals and 76 points the following season.
He was an NHL First Team All-Star in both seasons.