ST. LOUIS -- Making his MLB debut to allow the pitching staff a break during a stretch of 16 games in 16 days, Michael McGreevy gave the Cardinals everything they could have hoped for and more on Wednesday.

It also didn’t hurt that the rookie got plenty of offensive support from a suddenly surging Cardinals lineup energized by the addition of red-hot slugger Tommy Pham.

The Cards' No. 15 prospect pitched seven innings of one-run baseball on five hits and one walk, and Pham added three hits and two more RBIs a night after smashing a grand slam in his first at-bat back with the Cardinals as St. Louis rolled to a 10-1 win over the Rangers on Wednesday at Busch Stadium.

McGreevy, the No. 18 overall pick of the 2021 MLB Draft, showed no signs of nerves in the early going, retiring 11 straight after yielding a first-inning double to Rangers star Marcus Semien. McGreevy, who pitched some of his best baseball for Triple-A Memphis in July, was in total control over the first five innings when he allowed just one hit and one walk.

Pham, who was acquired along with veteran right-handed pitcher Erick Fedde on Monday in a three-team trade with the White Sox and Dodgers, electrified Cardinals fans on Tuesday night with an opposite-field grand slam to begin his second stint with St. Louis. On Wednesday, Pham singled in the second inning, doubled in two runs in the fifth and added a third hit in the seventh. In two games with a Cardinals offense that has pounded out 23 hits and scored 18 runs over the past two days, Pham is 4-for-6 with three runs scored and six RBIs.