ARLINGTON -- The Rangers’ revolving doors of unexpected heroes goes round and round each day before landing on that night’s ultimate winner.

Michael Helman , come to center stage for your close-up.

On Monday night, the Rangers’ 29-year-old rookie stepped up to the plate to face Brewers starter Jose Quintana in the fifth inning with the bases loaded for the first time in his young career. And Helman delivered.

Helman launched a Statcast-projected 381-foot grand slam over the left-field wall, collecting the Rangers’ first grand slam of the season and the first of his career. He, alone, carried Texas to a 5-0 win over the Brewers to open a three-game set at Globe Life Field.

Quintana took a perfect game into that fated fifth inning. Then, a dropped foul pop led to a Jake Burger walk, K

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