Rushing Success Rate
The same down-based success standard as passing success rate, applied to a player's carries.
Inputs: Down, distance, yards gained and touchdown on plays where this player was the ball carrier.
Receiving Success Rate
The same down-based success standard, applied to a player's targets (thrown to him, complete or not).
Inputs: Down, distance, yards gained and touchdown on plays where this player was the targeted receiver.
3rd Down Splits
How a player performed specifically on 3rd down plays this season -- success rate, touchdown rate, and the underlying counting stats, isolated from every other down.
Inputs: Every play on file where down = 3 and this player was involved (passer, rusher, receiver, or a tackle/sack/INT/fumble recovery on defense).
4th Down Splits
The same idea as 3rd Down Splits, isolated to 4th down plays -- the highest-leverage down in football.
Inputs: Every play on file where down = 4 and this player was involved.