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The Lens · Rookie Report

The Rookie Class Sends Its Report Card

JULY 4, 2026

The first-year players worth watching.

Today belongs to the newcomers. Munetaka Murakami leads a rookie hitting board that runs deep, and a pair of young arms are keeping their ERAs where veterans would be jealous. Here's who's arrived and who's climbing.

The rookie class

Top first-year players, hitters by OPS (minimum real playing time).

Munetaka Murakami tops the rookie bats with a .938 OPS and 20 home runs for the White Sox, already the class of this group. Colorado has two on the list, with Cole Carrigg at .907 and TJ Rumfield at .859, while Atlanta's Didier Fuentes (2.41 ERA) and San Diego's Bradgley Rodriguez (2.00) lead the rookie arms.

Rookies breaking out

Rookies with the biggest OPS jump this week.

Owen Caissie is the one on the move, nudging his OPS up 30 points to .744 for the Marlins. Not a leap yet, but the kind of quiet climb that turns into something.

Stats via the MLB Stats API. Colors, form scores and power rankings are Baseball Lens's own.