This table explained
Pulling the ideas mostly from Football Outsiders’ NFL stats, below are the following defensive line stats for each of FBS' 130 schools.
- Line Yards per Carry: For 2018, we are experimenting with a new definition for college line yardage based on film study and generalization. Instead of the ALY figure FO used for the NFL, this one is tighter: the line gets credit for rushing yardage between 0-3 yards (instead of 0-4) and 50% credit for yards 4-8 (instead of 5-10). Anything over 8 yards is quantified as a highlight opportunity, and credit goes to the runner. As with the pro definition, lost yardage still counts for 125%. (Garbage time is filtered out for all line yardage averages.)
- Standard Downs Line Yards per Carry: The raw, unadjusted per-carry line yardage for a team on standard downs (first down, second-and-7 or fewer, third-and-4 or fewer, fourth-and-4 or fewer).
- Passing Downs Line Yards per Carry: The same unadjusted averages for rushing on passing downs.
- Opportunity Rate: The percentage of carries (when four yards are available) that gain at least four yards, i.e. the percentage of carries in which the line does its job, so to speak.
- Power Success Rate: This is the same as on the NFL side -- percentage of runs on third or fourth down, two yards or less to go, that achieved a first down or touchdown.
- Stuff Rate: Same as STUFFED on the NFL side -- percentage of carries by running backs that are stopped at or before the line of scrimmage.
- Sack Rate: Unadjusted sack rate for all non-garbage time pass attempts.
- Standard Downs Sack Rate: Unadjusted sack rate for standard downs pass attempts.
- Passing Downs Sack Rate: Unadjusted sack rate for passing downs pass attempts.