Key reserve's departure to Philadelphia challenges Bears' depth

The 30-year-old, 6-foot-7, 332-pounder didn't tear it up as a pass blocker with seven sacks and 24 penalties allowed. The seven sacks allowed left him behind 130 out of 135 guards in avoiding sacks, according to Pro Football Focus. Yet, PFF gave him the second-best pass blocking grade of his career.

Pryor wound up playing a career-high 1,005 snaps, 895 at right guard, with 15 starts after starter Nate Davis has completely washed out. Pryor was on for one play at left tackle and 59 at right tackle.

Another backup guard who had to play because of Teven Jenkins' injuries, Bill Murray, had a PFF grade even higher than Pryor in a brief stint before a season-ending injury. 

The Bears are not entirely depleted at these backup interior line positions behind new starters Joe Thuney and Jonah Jackson, as Murray is still there, Ryan Bates is healthy know and plays both guard and center, and backup center Doug Kramer has also had some guard experience. Chris Glaser, who they signed last year, is still with the team, as well.

The need is there to find at least one more backup guard in the draft, however.

Pryor had started out in the league with the Eagles, then was with the Colts and 49ers before his one Bears season.