Sam Antonacci

Antonacci made his MLB debut on April 15 and has quietly become one of the most efficient contributors on the waiver wire — combining elite on-base skills (.426 OBP in June), mixed-category production (9 SB, 4 HR since June 1), and the kind of multi-position eligibility that wins formats. The .374 xwOBA is actually better than his already-strong .362 actual, meaning the surface stats are underselling him. At 18% ownership while batting leadoff for a surprisingly energetic White Sox offense, Antonacci is the clearest market inefficiency available in 14-team leagues right now.

The White Sox leadoff man is a legitimate multi-category threat no one is talking about. A .316/.426/.521 June line with 11 steals since May and multi-position eligibility (2B/3B in most formats) makes him a no-brainer add. At 18% owned, you're still getting him for free in almost every league.

Chicago's leadoff man is a dark-horse ROY candidate with elite speed and emerging power. Eleven stolen bases in 45 days with a .438 OBP makes him a top multi-category contributor in points leagues and roto alike. Add before he hits 30% owned.

OBP .317 → .376 (Δ +0.059)

OBP 0.290 → .378 (Δ +0.088)

OBP 0.263 → .358 (Δ +0.095)