MILWAUKEE (AP) -- Casey McGehee hit his first career grand slam moments after committing a costly gaffe and J.J. Hardy tied a career high with four hits, including a homer, to lift the Milwaukee Brewers to a 10-6 win over the reeling New York Mets on Monday night.

The Mets have lost four straight, falling under .500 (37-38) for the first time since May 5, and not even the previously unflappable Fernando Nieve (3-1) could help. He gave up 11 hits and three runs before being pulled.

McGehee made up for giving the Mets life with starter Braden Looper (6-4) cruising and Milwaukee leading 3-0.

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