Portland Timbers midfielder Diego Valeri will miss Wednesday's match against the Montreal Impact as he continues to recover from injury, while winger Darren Mattocks is out for the next 8-10 weeks with a hamstring injury.

Timbers coach Caleb Porter said that Valeri is still recovering from an ankle sprain and contusion that he sustained during Portland's U.S. Open Cup game against the LA Galaxy on June 29.

Porter said that Valeri is still having trouble kicking the ball, but he added that he is hopeful that the midfielder will be back for Sunday's game against the Seattle Sounders.

"He's moving really well on the pitch right now, which is really promising, but he's having trouble kicking the ball," Porter said. "We're hopeful with another four, five days from now until Seattle that he'll be able to progress and play in that game."

Mattocks left Sunday's game against the New York Red Bulls in the first minute after suffering a hamstring injury. Porter said the injury will sideline Mattocks for the next 8-10 weeks.

The list of injuries "got shorter and then it got longer again," Porter said.

Porter said that Timbers goalkeeper Adam Kwarasey (finger injury) has been in training the last two days, but won't be healthy enough to play Wednesday against Montreal. Porter said that Kwarasey could be on the bench Sunday when the Timbers face Seattle.

"Adam is getting close," Porter said.

-- Jamie Goldberg | jgoldberg@oregonian.com

503-853-3761 | @jamiebgoldberg