It was the third career multi-homer game for Morrison, who hit a three-run homer to right field that made it 5-0 in the first. McHugh (6-3), who had a 13-2 record with a 3.15 ERA in his previous 22 starts, hasn't been nearly as sharp as he was last year and the first month of this season.
Mariners left-hander Mike Montgomery (1-1) picked up his first career win by holding to the Astros to one run and six hits in six innings in his third career start. The only run he allowed came in the fifth, when Jason Castro and George Springer hit back-to-back one-out doubles.