TUCSON, Ariz. - Tenth-ranked Arizona softball completed its undefeated weekend at the Hillenbrand Invitational on Sunday, run-ruling Tulsa 10-2 in six innings to finish the first weekend of the 2017 season 5-0.

Katiyana Mauga homered again, her fourth of the weekend, one of two long balls on Sunday for the Cats. Mo Mercado launched her first homer of the year as well. Mercado drove in four runs in the game.

The seniors led the way for the UA offense, which plated 10 runs on nine hits, while Danielle O'Toole continued to dominate in the circle.

O'Toole did not allow an earned run in the complete-game victory. The senior, who improved to 3-0 on the year with the win, allowed two runs, both unearned, on six hits with six strikeouts and no walks. The Upland, California native gave up a run in the first inning of UA's first game of the season and did not allow an earned run in her next 19 frames.

Tulsa (1-4) committed four errors that led to a trio of unearned runs for Arizona.

Mandie Perez and Dejah Mulipola led off the bottom of the first inning with singles and scored on Mo Mercado's two-out, three-run homer to center field.

The Cats added to their lead in the second, plating a pair of unearned runs to extend to a 5-0 lead.

Katiyana Mauga led off the bottom of the third with her fourth home run of the weekend to put UA up 6-0. Arizona would then load the bases with one out, but could not take advantage against a new pitcher, Lexi Blevins.

While Blevins went to work, retiring the first batters she faced, the Tulsa offense finally got going, courtesy of some UA defensive blunders. The Golden Hurricane scored two unearned runs in the fifth to cut UA's lead to 6-2.

The Cats' bats woke back up in the seventh, as UA scored four runs to walk off with the run-rule win. Alyssa Palomino plated two with a bases-loaded single before ground balls by Mercado and Staman drove in runs to win the game.