Malnati, 27, came home with a sizzling 6-under 30 on the front nine of El Bosque Golf Club in Leon, Guanajuato, Mexico, after starting the day on the back nine. He made six birdies in the final nine holes and continued a remarkable year.
Malnati is ranked No. 1 on the Web.com Tour money list this year, having won earlier in 2015 at the Brasil Champions.
Doug Miller is a reporter for MLB.com. Follow him on Twitter @DougMillerMLB and read his MLBlog, Youneverknow. This story was not subject to the approval of Major League Baseball or its clubs.