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Matt Peacock propels Arizona Diamondbacks past Colorado Rockies in major league debut

The Diamondbacks won in relentless fashion on Tuesday night at Coors Field, blowing leads but reclaiming them, making mistakes but overcoming them. It was a victory they hope will mean more than just a single mark in the standings, one they want to be able to point to as the start of something.

And yet the lasting image from their 10-8, 13-inning victory over the Colorado Rockies on Tuesday night was that of a relief pitcher in his major league debut racing around the bases with a two-sizes-too-big helmet nearly covering his eyes.

“Golly,” rookie Matt Peacock said, “I hadn’t run this much since preschool.