AY/Att – Air Yards per Attempt. The average distance the ball travels through the air per pass attempt.
CTgt – Contested target. Any time the receiver had to compete with a defensive back for the ball.
CRec – Contested targets which still resulted in a completed pass.
Db – Dropbacks. Total number of times a QB drops back to pass.
Dp – Number of dropped passes by receivers.
Fm – Fumble
Fm Lst – Fumble lost
Ht – A hit on the QB.
Hur – Hurry. When the QB was forced from the pocket, or forced to rush/alter his throw by a defender.
MT – Missed tackle (or missed tackles forced for offensive players).
PB Snaps – Pass block snaps.
PB % – Pass block percentage. Total percentage of pass block snaps on which the blocker did not allow a sack, hit or hurry.
Pres – Number of times QB was pressured.
Stuff – Any play resulting a zero or negative yards.
TA – Thrown away. Number of balls thrown away by QB.
Tack % – Tackle percentage. Calculated as tackles divided by tackles + missed tackles)
YAC (RBs) – Yards after contact. Defined as yards gained after significant contact which took some level of strength and/or agility to avoid. Does not include yards after the first minor or incidental contact.
YAC (WRs) – Yards after catch.