Iowa football left guard Beau Stephens was injured in the second quarter of the Hawkeyes' Week 12 game at USC .

Here's what we know.

Beau Stephens injury update

Per Iowa radio, Stephens exited Saturday's game with an upper-body injury. He did not return to the field after halftime, as of the 7-minute mark of the third quarter.

Stephens' backup is Leighton Jones.

Midway through the third quarter, Iowa has run the ball very well, tallying 111 yards and a score on 23 carries.

Stephens is a key piece of the Hawkeyes' offensive line. He's started 31 games across five season in the program and has been a full-time start over the past two years.

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