QoC : Quality of Competition : Opposing Lineups' OPS splits vs Pitcher's Hand. Higher is More Difficult Result OPS : Opposing Lineups' OPS against Pitcher during period/game. Lower is better result for pitcher OPS Suppression : Quality VS Competition : (Result - Expected OPS). How much they suppress an opponent's OPS. Lower/Negative better. Supp+K : A Bias-Free Player Rater, Adjusted for Past Strength of Schedule, but Ignorant of Team Context (wins). Higher = Better Pitcher