also: run fits · fitting the run · fit
On defense, who owns which gap once the blocks show. On offense, the position your body is in when you make contact. One syllable, two unrelated things.
2 meanings, all below. Jump to the one you heard.
The defensive assignment of every defender to a gap, an edge, or a space, resolved after the blocking scheme declares itself rather than before the snap. A defense is fit correctly when there is a body for every gap and the players left over know their place, such as the alley or capping the run from depth, and most long runs are a fit failure rather than a missed tackle.
Coaches also count how many defenders the call puts in the fit. Seven-man spacing goes with middle-of-the-field-open coverages such as quarters, eight-man with a single-high coverage such as Cover 1 or Cover 3, and nine-man with pressure and Cover 0.
run fits, gap responsibilitythe offensive fit, run blitzOn offense, the fit is the body position at the point of contact: pad level, hand placement, hips, feet. Coaches fit players up before a drill, walking them into the finished position before running it at speed.
fit position, fitting uprun fits