Texas Rangers top prospect Kumar Rocker struck out seven and allowed one run in four innings against the Seattle Mariners in his MLB debut Thursday night.

ARLINGTON — Here’s the deal: Statcast classifies Kumar Rocker’s nasty breaking pitch as a slider. He calls it a curveball and a “slider at times.” It was the most effective tool in his Texas Rangers debut last Thursday against the Seattle Mariners and secured five of his seven strikeouts.

Kumar Rocker, the former Vanderbilt baseball ace pitcher, will make his MLB debut for the Texas Rangers this week.

Texas Rangers heralded young pitcher Kumar Rocker struck out five in his Globe Life Field debut but struggled with his command over three innings.

Rocker, the No. 3 overall pick in the 2022 MLB draft, has been dominant in seven Double-A and Triple-A starts this year.