I don't subscribe to PFF, but here's what's available for free, from last season:
T Brown: 579 snaps, 2 penalties, 3 sacks, 80.2 rating
C Okorafor: 436 snaps, 8 penalties, 2 sacks, 60.4 rating
V Lowe: 476 snaps, 2 penalties, 6 sacks, 41.7 rating
Chuks is roughly the average of Brown and Lowe...