Oregon Ducks quarterback Marcus Mariota is playing through a knee injury, according to a report.
KVAL sports reporter Collin Harmon reported on Thursday that the MCL in Mariota’s left knee is partially sprained.
Mariota was wearing a brace on his left knee during the Ducks’ game at Stanford on Thursday. You can see him with one on his left knee during warmups:

Mariota with knee brace — what's up? pic.twitter.com/BDoqvHi4v0
— Ahsan Awan (@Quackarazzi) November 8, 2013
Mariota also wore a brace on his left knee during the second half of the Ducks’ win over UCLA. Oregon outscored UCLA 28-0 in the second half of their 42-14 win.
Mariota entered Thursday’s game at Stanford with 20 touchdown passes, no interceptions and nine rushing touchdowns. He struggled as Oregon was shut out in the first half of the game, though he finished 20-of-34 for 250 yards and two touchdowns.