Coming into the series with a slim 5.5-game lead in the Pacific North division, the Aces now have taken each of the first two games over second-place Tacoma, shrinking their magic number to nine with just 16 games to play.
Kroenke (9-2) was the star Sunday, surrendering just two runs on six hits in seven innings of work. The left-hander retired 14 of the final 16 batters he faced en route to his team-high-tying ninth win.
The Aces bullpen preserved the win, as Kam Mickolio picked up his 13th hold — tossing a scoreless eighth — before Sam Demel took the ball in the ninth, earning his first save with Reno.
The Aces put up single runs in four frames, with Mark Hallberg providing the eventual game-winning run with an RBI single in the fourth, breaking a 2-2 tie. Cole Gillespie added an insurance run with an opposite-field solo home run in the sixth.
Nate Robertson (5-6) took the loss for Tacoma, allowing all four Aces runs and nine hits in 6.2 innings of work for the Rainiers.
Angel Berroa and Konrad Schmidt were the lone Aces batters to record two hits Sunday, finishing 2-for-4 with a pair of singles apiece. Gillespie added a pair of RBIs, ending the day 1-for-1 with two walks and a run scored.
Reno and Tacoma square off again tonight at Aces Ballpark. RHP Gaby Hernandez (4-6, 6.49 ERA) takes the ball for the Aces, while the Rainiers will counter with LHP Anthony Vasquez (4-3, 3.21 ERA). First pitch is set for 7:05 p.m. PT.