For those interested in following the guidelines that the stadium stat crews are supposed to be following, here are
my notes from the training video sent to all stat crews in 2007:
Out of Bounds Plays
* Award solo tackle if the defender contacts the ballcarrier before he steps out of bounds.
* Award solo tackle if the ballcarrier steps out of bounds to avoid imminent contact with defender.
* Do not award solo tackle if the ballcarrier's momentum carries him out of bounds before defender arrives.
* Do not award solo tackle when a ballcarrier runs out of bounds specifically to stop the clock.
Assisted Tackles
* Award assisted tackle if second defender materially shortens the duration of the play.
* Award two assisted tackles (and no solo tackle) if the ballcarrier is hit simultaneously by two defenders.
* Award two assisted tackles (and no solo tackle) if the first defender is unable to complete the tackle himself. This may be used in an "in the grasp" situation or a shared sack.
* Do not award assisted tackle if ballcarrier would have been tackled without contact from another defender. Players who pile on should not be awarded an assisted tackle.
* Do not award assisted (or solo) tackle if ballcarrier completely escapes the initial contact.
* Do not award assisted tackles on quarterback slides.
Passes Defensed
* An interception is a pass defensed (corollary to a sack is a solo tackle, half-sack is an assisted tackle).
* Award a pass defensed if a defender bats down a catchable ball.
* Award a pass defensed if a defender bats a ball down at the line of scrimmage while playing the pass.
* Award a pass defensed if a defender jars the ball loose and prevents a reception.
* Do not award a pass defensed if a ball is uncatchable, including situations where a ball is caught but the receiver is deemed out of bounds.
* Do not award a pass defensed if a pass rusher inadvertently causes an incomplete pass in the process of rushing the passer.
* Two passes defensed may be awarded if a pass is deflected by one defender then intercepted by a different defender.