Monday March 31st, 2014

Miles Dieffenbach Penn State offensive guard Miles Dieffenbach (65) has reportedly suffered a serious knee injury. (Gene Puskar/AP)

One of Penn State's few returning offensive line starters has suffered a "serious knee injury," according to Sean Fitz of Lions247. Senior guard Miles Dieffenbach went down with the injury last week during spring practice, and the Nittany Lions are likely to be without him for the "foreseeable future."

Dieffenbach was one of two returning starters on the offensive line heading into spring workouts. He started 23 games over the past two seasons, including all 12 at left guard in 2013. Left tackle Donovan Smith is now the only healthy returning lineman with starting experience.

On Saturday, Brian Gaia and Derek Dowrey took snaps at the two guard positions on Penn State's first-team offense. Coach James Franklin signed four offensive linemen in his first recruiting class in February, including tackle Chasz Wright, who is the only early enrollee from the group. Offensive line depth could become a major concern in Franklin's first season in Happy Valley.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.