FOXBOROUGH, Mass. -- New England Revolution captain Steve Ralston will miss the rest of the season because of a knee injury.

Ralston tore the ACL in his right knee during the Revolution's 2-1 win Saturday against the Seattle Sounders FC. He came down awkwardly while going for a ball, and is expected to have surgery.

The 35-year-old Ralston ranked second on the team in goals (7) and assists (7) while appearing in 20 games this season. Ralston is the MLS career leader in games played with 378.

The Revolution (10-8-7) rank third in the Eastern Conference. The team travels to play FC Dallas on Wednesday at the Cotton Bowl.