Jul 01, 2010 11:39 PM EST

The Arizona Diamondbacks have shockingly fired their general manager Josh Byrnes, along with manager A.J. Hinch.

"That is a brutal decision," said a rival executive. "They just tore apart one of the best front offices in baseball."

Byrnes was under contract for the next five years.

Via Buster Olney/ESPN (via Twitter)