Seattle Seahawks coach Mike Macdonald said star wide receiver DK Metcalf suffered a Grade 1 MCL sprain, Brady Henderson of ESPN reports.

A source told ESPN's Adam Schefter earlier Monday that Metcalf was considered week-to-week. Macdonald, in a videoconference with reporters later in the day, did not rule out the possibility of Metcalf playing in the Seahawks' Week 8 game against the Buffalo Bills in Seattle, describing his injury as "minor."

"Timeline, I'm not sure," Macdonald said. "It doesn't look like it's a long-term injury and I know you guys know DK, we know DK -- he's going to probably do anything humanly possible to be able to play in this game, I would imagine. We'll assess it as the week kind of unfolds here."

Metcalf, whose 568 receiving yards are second most in the NFL this season, was hurt late in the third quarter of Sunday's win over the Atlanta Falcons while attempting to make a sideline catch. The Fox broadcast later showed a replay of the receiver recoiling in discomfort as the Seahawks' team physician moved his right knee while examining it on the sideline.

Metcalf was announced as questionable to return and was taken into the locker room on the back of an injury cart midway through the fourth quarter, with an ice wrap over his right knee.

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