Pitcher List's top deep-league add. Horwitz takes over as the Pirates' everyday 1B with Ryan O'Hearn on the IL (quad strain). He's hitting .274/.387/.419 overall — and 1.000+ OPS in May. The plate discipline is elite (sub-15% K-rate, 12% BB-rate). Top-30 1B rest of season floor with the lineup spot locked in.

OBP 0.208 → .383 (Δ +0.175)

OBP 0.188 → .345 (Δ +0.157)