This leaderboard is intended to easily identify which players have turned around their performance -- in either direction -- from the period directly preceding it.
THEN: The player's performance in the selected stat over his previous N plate appearances.
NOW: The player's performance in the selected stat over his most recent N plate appearances.
DELTA Δ: The difference between 'then' and 'now.'
NOTE: Plate appearances may stretch across multiple seasons. Click players name to view the players rolling breakdown charts.