Peterson-Gribble defy odds in alternate shot

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AVONDALE, La. – No format strikes fear in proud PGA Tour players like alternate shot, so the idea of two slumping pros teaming up on a hazard-ridden course?

No one of sound mind would sign up for that.

And yet John Peterson and Cody Gribble have approached this Zurich Classic with short memories, with the nonchalance of a member-member and the belief in each other that can only be earned after nearly 20 years of friendship.

For anyone else, there’d be reasons to fret here at TPC Louisiana: Playing on a major medical extension, Peterson has only four events remaining to make more than $300,000. If he doesn’t, he’s putting away his clubs – for good. His partner, Gribble, won in his…