The Wolf Pack, winners of four-straight now, wasted little time with the heroics in the ninth.
Nevada was opportunistic once again Monday, capitalizing on three CSU Bakersfield errors en route to taking the four-game series with a 7-4 win.
Despite the loss, the Aces maintain a 19-8 record against the Aviators in the Silver State Diamond Challenge
A solo shot to left from Cole Tucker in the fifth put the Aces on the board and trimmed the deficit to 5-1.
In the third frame, the Aces allowed three runs to the Bees for an early 3-0 deficit.
Pfaadt went 3-0 with a 2.03 ERA in five starts since his promotion to the Aces on August 2.
Corbin Carroll gave the Aces a quick 1-0 lead with a leadoff 463-foot solo homer to center in the first inning.
Corbin Carroll was the lone Ace to record a multi-hit game with a 2-for-4 effort, including a double and a run scored.