Orlando City SC forward Dom Dwyer underwent arthroscopic surgery to treat a partial tendon tear in his left knee, the team announced Saturday.
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Dwyer previously had been ruled out of the remainder of the MLS is Back Tournament with the injury. He is expected to be sidelined for four-to-six months.
"Unfortunately injuries are a part of the game & something I've been battling for awhile," Dwyer wrote Friday on Twitter. "To my teammates & to the fans, I'm sorry. My desire remains the same to help bring success to this club. I'll be working to come back stronger & better."
Dwyer last participated in Orlando City's 3-1 win over New York City FC on July 14.
The 30-year-old has notched an assist in two matches this season for Orlando City (2-1-2, 8 points), who defeated LAFC 5-4 on penalty kicks after a 1-1 tie in a quarterfinal match of the MLS is Back Tournament near Orlando on Friday.
The Lions advance to a Thursday semifinal vs. the winner of the San Jose Earthquakes-Minnesota United FC quarterfinal that will be played Saturday.
Dwyer has recorded 81 goals and 18 assists in 195 career matches with Sporting Kansas City and Orlando City.