File photo of Islanders defenseman Mark Streit.

File photo of Islanders defenseman Mark Streit. Credit: Christopher Pasatieri

Despite months of aggressive rehab to return from a preseason shoulder injury, Mark Streit's 2010-11 season will end without a single game.

With less than three weeks remaining in the regular season, the Islanders announced Thursday that the 33-year-old defenseman is done for the year.

"The clock just kind of winded down for him," general manager Garth Snow said before Thursday night's 2-1 loss to Atlanta at the Coliseum.

Thrashers center Rob Schremp scored the go-ahead goal against his former team. John Tavares tied the game at 1 with his 27th of the season earlier in the second, but Schremp's winner from the left circle gave him some revenge against the team that waived him last month. The Islanders were outshot 34-15 and managed only seven shots on goal over the first two periods.

The Islanders attack has struggled at times with Streit at the point.

"He has trained extremely hard to get back," said Snow. "He's disappointed and we're obviously disappointed he won't be getting the medical clearance.

"He missed a significant amount of time during the season, and we as an organization want what's best for him and us," Snow said. "For him to be 100 percent raring to go in September is the most important thing for everyone involved."

Streit, who suffered a torn labrum, torn rotator cuff and dislocated left shoulder during an intrasquad game in September, never received clearance for full contact. Streit was not available for comment Thursday, but Snow said he is "extremely disappointed."

The former All-Star also will not be available to play for the Swiss team in next month's World Hockey Championships. Snow said he had not yet spoken with Streit about the world championships but does not "foresee" him playing.

"I'm not comfortable with an injury of this nature," Snow said. "We've come this far in the healing process and the rehab. I'm not willing to take a risk like that."

Snow said Streit will continue to skate and follow his rehab program. His preparation for next season, Snow said, "won't be compromised at all."

"He'll be 100 percent for training camp," Snow said.

Coach Jack Capuano and Streit's teammates sympathized with his difficult season.

"I feel bad for the kid," Capuano said. "I know how frustrated he must be. I could see it in his eyes today."

"It's got to be frustrating for him," defenseman Andrew MacDonald said. "He was pretty devastated when it happened and we all felt really bad for him. We really missed him this year. He's the type of player that . . . could've really won us some games."

Said Streit's rehab partner, Kyle Okposo, who also suffered a preseason shoulder injury: "I can't even fathom how he feels."

Snow said Streit's injury -- one of many suffered by the Islanders during a season in which they had a league-leading 518 man-games lost -- was the team's most significant absence. Streit led the Islanders in ice time last season and finished third in scoring with 49 points (11 goals, 38 assists).

"He's one of the top power-play QB defensemen in the league," Snow said. "You don't replace a player like Mark Streit. "

Said Snow, "The silver lining is we got to see a player like Travis Hamonic evolve; Andrew MacDonald, playing the way he has this year, that's also a plus for us. Going into next year, those are positive signs."

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