All four games were decided by one run, one of them in extra innings.

NAVOJOA 3, MEXICALI 2 IN MEXICALI (15 INNINGS)

Navojoa:  Rolando Accosta was 4-for-7 with a double and scored twice.  Luis Fonseca was 3-for-7.  Alejandro Garrido struck out three in three shutout innings, giving up no hits and one walk.

Mexicali:  Oscar Robles was 2-for-4 with two walks.  Oscar Verdugo struck out four in three shutout innings, allowing no hits and two walks.

The game:  Navojoa scored two in the second and Mexicali tied it with two in the sixth.  It stayed there until the fifteenth, when Acosta hit a one-out double and scored on a Genaro Andrade single.

MAZATLAN 2, LOS MOCHIS 1 IN MAZATLAN

Los Mochis:  Saul Soto was 2-for-4.  Thomas Melgarejo pitched six innings, giving up two runs on four hits and a walk with two strikeouts.

Mazatlan:  Henry Mateo was 2-for-4 with a triple, scoring once and driving in one.  Mauricio Lara pitched six shutout innings, allowing two hits and two walks with two strikeouts.

The game:  Mazatlan took a 1-0 lead in the fourth on a sacrifice fly and got an insurance run in the fifth on an RBI triple by Mateo.  Los Mochis got one back in the eighth when Rodolfo Amador hit a pinch-hit RBI double.  That was as close as Los Mochis would come.

OBREGON 3, CULIACAN 2 IN OBREGON

Culiacan:  Alejandro Armenta pitched five innings, giving up two runs on four hits and four walks with three strikeouts.  Humberto Cota was 1-for-2 with two walks.

Obregon:  Christian Villanueva was 2-for-3 with a double and scored once.  Dan Robertson (San Diego) was 2-for-4 with a double.  Steve Hammond pitched five innings, allowing two runs (one earned) on six hits and three walks with four strikeouts.

The game:  Culiacan scored one in the first, but Agustin Murillo hit a two-run homer in the bottom of the first to make it 2-1.  An RBI groundout tied it at two in the fifth.  In the sixth, Carlos Valencia doubled in Villanueva to make it 3-2.  Culiacan did not get another man on base.

GUASAVE 5, HERMOSILLO 4 IN GUASAVE

Hermosillo:  Jesse Gutierrez was 2-for-4 with a double and a home run, his fifth.  Jose Aguilar was 2-for-4 with a double.

Guasave:  Jose Rodriguez was 2-for-5.  Zelous Wheeler (Baltimore) was 1-for-2 with two walks and a home run (his fourth), scoring twice.

The game:  Hermosillo scored single runs in the second, third, and fourth to go ahead 3-1.  Guasave tied it in the bottom of the fourth when Kailin Sams doubled to drive in two.  Guasave took a 4-3 lead in the fifth, but Hermosillo tied it in the sixth.  In the seventh, Wheeler walked, took second on an error, and scored on a single by Ivan Araujo to give Guasave a 5-4 lead.  Hermosillo got runners on first and third with one out in the ninth, but a double play ended the game.