I looked to see who's been starting for Las Vegas. McHugh has a 0.50 ERA in 18 innings and 3 starts. He'd be the guy to call up. Wheeler is at 3.86 ERA, 3 starts, 14 innings. Others are Chris Schwinden (3 starts, 8.10 ERA, 13.1 innings); Carlos Torres (2 starts, 5.19 ERA, 8.2 innings); and Darin Gorski (2 starts, 9.00 ERA, 7 innings).