Portland Timbers captain Liam Ridgewell and forward Fanendo Adi remain questionable for Saturday's game at Toronto FC after leaving last weekend's match against the LA Galaxy with injuries.

Ridgewell left the match in the 89th minute after aggravating his quad. Adi left the game in the 56th minute after tweaking his hamstring on a backheel pass that led to a goal by Alvas Powell.

Timbers coach Caleb Porter said that the club believes Ridgewell, who has missed eight-straight games after injuring and re-injuring his quad, may have broken up some scar tissue in his quad during the game against the Galaxy.

While Porter said he did not think at this point that the injury was severe, he also said that it remains unclear whether Ridgewell will be healthy enough to play against Toronto.

"With Liam, we're still evaluating it," Porter said. "It's less severe than we originally thought, but we won't really know for sure until we see how he progresses over the next several days... He could be available this weekend. That might be tight as well, so he might not be available."

Porter said Adi didn't train Wednesday and the club was still evaluating his availability for Saturday's match.

"He had a little bit of a cramp and he was sore after the game," Porter said. "He didn't train today. He's another one, obviously, it being Wednesday we don't have any definite information regarding his availability for this weekend, but we don't think it's severe."

Timbers left back Marco Farfan also remains out with an ankle injury, while defender Roy Miller will be suspended for Saturday's game due to yellow card accumulation. With Miller and Farfan out, Vytas, who had been dealing with a calf injury, but was in the 18 last week, is likely to slot into the left back role.

Timbers winger Darren Mattocks, who had been dealing with a shoulder injury, left Tuesday's training after going down during a short-sided game. But Porter said Wednesday that Mattocks was fine and should be available for Saturday's match.

-- Jamie Goldberg | jgoldberg@oregonian.com

503-853-3761 | @jamiebgoldberg