How Peralta dominated his debut with 1 pitch

Peralta on Major League debut PHOENIX -- The data was so surprising they double-checked it Monday morning, and yes, 21-year-old Brewers right-hander Freddy Peralta threw four-seam fastballs for 90 of his 98 pitches of Sunday's sparkling, 13-strikeout Major League debut at Coors Field.

How does a rookie dominate a Major League game with essentially a single pitch? With two varieties of that pitch -- one of which behaves like a cutter.

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"It's a different grip, and I throw it and the ball just goes," Peralta said. "It's the same speed; 92, 93, 94 [mph]. I threw a lot of fastballs, yeah. A lot. They couldn't hit the fastball yesterday."

Said Christian Yelich, who had a clear…