Identifying the optimal set-piece taker for each delivery type and pitch location requires data that most clubs don't systematically collect. Free kicks vary by distance, angle, and delivery style (power, curl, placement over wall). Corners vary by delivery height, pace, and target zone. Building leaderboards from training data — tracking each player's outcomes from each set-piece type and location — enables objective assignment decisions rather than defaulting to "who looks good in training."
Process: (1) during training, track every set-piece delivery with event data; (2) tag by type (direct free kick, in-swinging corner, out-swinging corner, etc.), distance, and angle; (3) build per-player leaderboards for each type; (4) identify specialists by type and zone — the player who is best at in-swinging left-foot corners may differ from the best at direct free kicks from 25 yards central. In-game assignment should flow from the leaderboard, not from status or habit.