Portland Timbers goalkeeper Adam Kwarasey is expected to miss four weeks after tearing a finger ligament in Saturday’s win over San Jose.

Kwarasey suffered the injury while scooping up a shot early in the second half. Coach Caleb Porter said on Tuesday that Kwarasey’s finger got stuck in the Providence Park turf. Kwarasey will not need surgery but must wear a splint on the finger.

Jake Gleeson, who replaced Kwarasey on Saturday, will be the starting goalkeeper while Kwarasey is out.

“The guys have a lot of confidence in Jake Gleeson, and it’s a great opportunity for him because he’ll be playing the next month at least,” Porter said.

Gleeson, 25, has been with the Timbers since they entered Major League Soccer in 2011. He appeared in four of the team’s first five regular-season MLS matches in 2011, starting three of them, because starting goalkeeper Troy Perkins was injured. He also started for an ill Kwarasey in a scoreless draw with Vancouver in the first leg of last season’s conference semifinals.