By Evan Bleier In an excerpt from his forthcoming biography Phil: The Rip-Roaring (and Unauthorized!) Biography of Golf’s Most Colorful Superstar that was published on firepitcollective.com, golf writer Alan Shipnuck alleges that Phil Mickelson’s reputation for gambling is well deserved and that the scale of his losses is far greater than had previously been reported. In the book, Shipnuck poses the theory that the real motivation for Mickelson being interested in playing in the new Saudi-backed golf league instead of on the PGA Tour is “the funny money being offered by the Saudis” and that re…