Buelna, who hit .278 in just 72 at-bats for the Venados during the regular season, was 2-for-2 after entering the deciding game as a pinch hitter in the eighth inning. With Weber at third base and John Lindsey on first, Buelna stroked a single to left field off reliever Arturo Barradas, who had intentionally walked Lindsey to pitch to Buelna.
Culiacan had tied the series at three games apiece with a 5-3 win on January 9. The Tomateros were trailing, 3-1, in the top of the seventh before Mike McCoy put the visitors ahead with a bases-loaded triple off reliever Jose Cobos. After Cobos was immediately yanked, Ramiro Pena singled in McCoy off Jose Luis Garcia.
Meanwhile, Hermosillo was putting the finishing touches on their 4-2 series win over Navojoa on January 9 with a 3-0 shutout over the Mayos in Hermosillo. Travis Blackley won his second playoff game with another superb effort, blanking Navojoa on one hit with seven strikeouts over eight innings. Humberto Cota scored one run and drove in another for the Naranjeros, who joined Mazatlan, Culiacan and Obregon in the semis. The Yaquis won their opening round series with Mexicali in five games.