It was sweet revenge for the No. 23-ranked University of Hawai'i softball team.

The Rainbows swept a Western Athletic Conference doubleheader from Nevada, 5-4 and 6-2, last night at Rainbow Wahine Softball Stadium. That completed a three-game series sweep and took a little sting off last year's conference tournament in which the Wolf Pack won 2 of 3 on the final day to claim the tournament title.

"It feels good," UH pitcher Kate Robinson said. "It's a little payback for the WAC tournament. Our goal was to send them home 0-5 and that's what we did, so we're pretty satisfied."

The Rainbows (30-7 overall, 3-0 WAC) also beat the Wolf Pack (7-22, 0-3) twice in non-conference games in last week's Bank of Hawai'i Invitational. Hawai'i extended its winning streak to six and will resume conference play this weekend when it hosts Louisiana Tech.

"Last year was probably the most hurtful day we've had being two innings away, up 2-1 in a game we felt as though we had," UH coach Bob Coolen said in reference to the tournament. "Losing 4-2 in the WAC championships and then losing 7-0, this team did it to us. We played three games against them in one day and for us to play them opening round, you can see the results. We had a mission. We had unfinished business and that was it right there."

Unlike Monday's 9-0 win that ended by the eight-run differential mercy rule, the Rainbows had to rally in each game last night.

In the opener, the Wolf Pack tagged UH starter Justine Smethurst, who lasted just two-plus innings, allowing four runs, in taking a 4-0 lead after the top of the third inning. But the Rainbows cut their deficit in half with two unearned runs on a throwing error by catcher Katie Stith after a single by Robinson loaded the bases. With runners at first and second, Robinson singled to left and Kaulana Gould, the runner at first, was headed to second when she noticed lead runner Claire Warwick retreating to second. Stith took the throw from the outfield, then tried to throw to second, but her throw sailed into center, allowing both runners to score to make it 4-2.

The Rainbows tied it in the fourth on Gould's two-run double. They won it in the bottom of the seventh when Valana Manuma led off with a double and Alana Power walked. Kathryn Grimes then lined a 2-1 pitch to left to drive in Manuma.

"I think she's gone from .048 before the tournament to what she's hitting now, which has to be over .200, which bodes well for us because everybody in the lineup is hitting .200-plus," Coolen said of Grimes.

Jessica Morton (7-1) pitched five scoreless innings of three-hit ball with a walk and seven strikeouts for UH, while Nevada starter Jordan McPherson (5-10) was tagged for five runs (three earned), nine hits and seven walks with three strikeouts in six-plus innings.

In the nightcap, Robinson (8-0) fired a three-hitter (all doubles), allowing two unearned runs, with eight strikeouts in going the distance. Nevada's Katie Holverson (2-11) was charged with six runs, eight hits and five walks in six innings.

After a two-run double by Kim Silagyi in the first that came after an error by shortstop Manuma, Robinson retired the next 14 batters. Robinson got into a jam in the sixth when Sam Bias doubled for the second time in the game and Kelsey Starr walked. A fielding error by third baseman Warwick loaded the bases, but Robinson struck out pinch hitter Kristin Stith to douse the threat.

The Rainbows took the lead in the third. Gould drew a bases-loaded walk to pull UH to 2-1, then Tyleen Tausaga singled to deep center to drive in two runs. Her hit might have been for extra bases, but the runners had to hold to see if center fielder Sarah Hunt would catch the ball.

Hawai'i added two runs in the fifth on a sacrifice fly by Brandi Peiler and RBI double by Manuma. It added a run in the sixth on an RBI single by Gould, who drove in Richie-Anne Titcomb, who had doubled earlier in the inning.

Reach Stacy Kaneshiro at skaneshiro@honoluluadvertiser.com.