Bobby Ay allowed five hits in 7 1/3 innings and Cal Poly compiled 14 hits for a 7-1 baseball victory over the University of Hawaii today in San Luis Obispo, Calif.

The Mustangs (12-8, 4-2) won two of the three games in this Big West series. The Rainbow Warriors fell to 19-11 and 1-2.

Ay entered with an 0-3 record and 4.50 earned-run average in five starts. But Ay did not allow a hit in the first five innings, and benefited from three controversial calls against UH. A UH run was nullified when it was ruled outfielder Alex Fitchett left third base too early on a flyout to right in the second inning. UH third-base coach Rusty McNamara was ejected for arguing vehemently.

In the third, Dylan Vchulek was initially ruled safe on a grounder to third, which would have placed runners at the corners with one out. But the umpires huddled, then reversed the call, ruling Vchulek out. Two batters later, Kekai Rios popped up to end the inning.

The game ended on a double play when it was ruled baserunner Logan Pouelsen interfered with the second baseman trying to make a relay throw.

The Mustangs took a 1-0 lead Scott Ogrin singled, went to third on Brett Binning’s double, and scored on Neil Uskali’s balk. Michael Sanderson, who moved from third to first because of a shoulder ailment, went 4-for-4 for the Mustangs.

The ‘Bows will remain on the mainland ahead of Thursday’s opener of a three-game series against UC Riverside.