Analyzing how teams enter the offensive zone (final quarter of the pitch) by comparing two primary methods: carries (player enters with the ball at their feet) and passes (ball is played into the zone). These two methods have fundamentally different spatial patterns and shot-generation rates. Carries account for ~27% of entries but produce shots 36% of the time; passes account for ~73% of entries but produce shots only 26% of the time. The conditional probability of shots and goals varies dramatically by entry method, lateral position, and entry length.
For each possession that enters the offensive zone, classify the entry event as carry or pass. Record: (1) starting position (x, y), (2) ending position (x, y), (3) length, (4) angle of entry. Then compute conditional probabilities: P(shot | entry type, starting position, length). Key patterns to identify:
Carries account for only 27% of offensive zone entries but produce shots 36% of the time. Passes are 73% of entries but only 26% produce shots. The critical distinction: carries compress toward the center (sideline to center), while passes expand toward the sidelines. Central carries ending in the middle 20m produce shots ~50% of the time. But the causal ambiguity is unresolved: do central carries CAUSE better outcomes, or do they only HAPPEN when the defense is already disorganized?
Carries ending in the middle 20m of the pitch produce shots 50% of the time — roughly double the shot rate of passes entering the same zone. The spatial pattern is the mechanism: carries start on the sideline and cut to center, arriving with momentum and face-on orientation that passes cannot replicate. The carrier has already committed defenders laterally, creating the shot opportunity through the movement itself.