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

Despite eight baserunners on the walks, a hit batter, a pair of singles and a costly error by third baseman Ezequiel Duran, Rocker was charged with only one earned run. Had Duran fielded the two-out grounder in third, he might have allowed just one run, period.

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.

Prospect made his Globe Life Field debut on Thursday. Could he join Cody Bradford, Jack Leiter in starting rotation?