SAN JOSE, Calif. -- Hawai'i capitalized on one inning's mistakes Saturday and got the win for the second straight day to clinch the series with a 4-1 win over San Jose State Saturday at Municipal Stadium.

The Rainbows (23-15, 4-1 WAC) scored three runs in the fifth to take the lead for good on two hits, an error, a hit-by-pitch and a wild pitch. A leadoff double by Garrett Champion, his third two-bagger of the series, started the frame.

Jason Kafka came in to relieve Spartans starter Esteban Guzman and loaded the bases by hitting Pi'ikea Kitamura after a fielding error by Jacob Valdez. A wild pitch to the next batter from Kafka tied the game at 1-1. Trevor Podratz then singled down the left field line to bring in two and make the score 3-1.

Hawai'i won Friday's series opener thanks to a big inning in the fourth that included two errors and five runs.

Matt Lopez went 2-for-4 for the Spartans (18-16, 3-2 WAC) -- his fourth consecutive multi-hit performance and fifth in the last six games. The Spartans got six hits Saturday to give them 16 in the series, but they stranded six, giving them 15 left on this weekend.

SPARTANS BULLPEN STRUGGLES

Saturday was the first time Kafka gave up an earned run since March 11 versus Santa Clara (six appearances). It was the first run he had surrendered since March 28 versus Brown (five appearances). Kafka (1-1) threw 2/3 of an inning with two runs, one earned, on one hit for the loss.

Kyle Hassna followed Kafka and gave up a solo homerun in the fourth inning to Zack Swasey. The junior would settle down to retire 11 of the last 12 batters he faced, including seven straight from the end of the seventh through the ninth.

ARAKAWA DEALS FOR THE RAINBOWS

Rainbows starter Jarrett Arakawa (5-3) limited the Spartans to one run on five hits in 7 2/3 innings of work. The left-hander retired 16 of the first 18 batters he faced, including 12 straight from the second to sixth innings.

Arakawa saw his first trouble in the sixth inning with two Spartans on base and one out, but he wriggled out of it by forcing Nick Schulz to ground into a double play.

Brent Harrison closed out the final 1 1/3 innings for his sixth save of the season, shutting out the Spartans on one hit to lower his season ERA to 0.76.

SPARTANS STRIKE EARLY AGAIN

San Jose State struck first for the second straight time in the series with a run in the second inning. With one out, Michael Gerlach hit his second triple of the season into the right field corner. The next batter Kyle Gallegos laid down a perfect safety squeeze bunt on the first pitch to give the Spartans the early 1-0 lead.

San Jose State has made a habit of getting on the board early in recent games. The Spartans have scored 10 runs in the first three innings over their last six games, including three in this weekend's series versus Hawai'i.

The series concludes with a game at 1 p.m. Sunday in Municipal Stadium.