Portland Timbers forward Fanendo Adi could be out for another few weeks due to a lingering hamstring injury.

The Timbers had hoped that Adi would be available for minutes last Sunday when they faced Orlando City SC, but the Nigerian striker did not progress as expected during the week and wasn't healthy enough to play in the match.

Adi has now missed seven-straight games due to hamstring injury and it is now unclear whether he will be back before the end of the regular season.

"It's looking like it's going to be another couple of weeks," Timbers coach Caleb Porter said. "He hasn't progressed like we thought. So, that's disappointing, obviously, because we had expected him to factor in last game off the bench and be in training and he just hasn't progressed."

Before suffering the hamstring injury against the LA Galaxy on Aug. 6, Adi had scored 10 goals in 22 starts for Timbers this season.

Despite missing their top striker, the Timbers have managed to go 4-2-1 in the last seven games thanks in large part to the production from Diego Valeri, who has scored in nine-straight matches.

Portland would certainly like to see its most consistent striker back on the field sooner rather than later, but Porter said it is important that the club is careful not to push Adi too soon and risk reinjury.

"He's still having issues with that hamstring," Porter said. "That means we need to be careful and smart with how we manage it because we can't be putting him in and getting him reinjured and having setbacks."

-- Jamie Goldberg | jgoldberg@oregonian.com

503-853-3761 | @jamiebgoldberg