In Sean Clifford's final season with Penn State, it was the freshman running back duo of Kaytron Allen and Nick Singleton that took the spotlight in OC Mike Yurcich's attack.

Here are the top-graded Nittany Lions on offense according to Pro Football Focus (PFF) (min. 200 snaps):

No. 1 -- RB KAYTRON ALLEN

With an 81.4 PFF grade, freshman running back Kaytron Allen is the highest-rated offensive player and third-highest on the team.

Allen had an impressive debut season in Happy Valley, totaling over 1,000 total yards and 10 touchdowns while splitting reps with Nick Singleton in the backfield.

No. 2 -- QB SEAN CLIFFORD

In his fourth and final season as Penn State's starting quarterback, Sean Clifford rewrote the record books as the program's all-time leader in passing yardage, touchdowns, and completion percentage.

Clifford's 77.4 PFF grade ranks him 56th among FBS quarterbacks.