Danielle O'Toole limited the nation's leading offense to two runs on four hits, engaging in a duel with back-to-back Pac-12 Pitcher of the Year Cheridan Hawkins, but the fifth-ranked Ducks came out on top, 2-0 in game 1.
Arizona (32-15, 9-7 Pac-12) managed just one hit off Hawkins, who sat down the final 17 Wildcats of the game.
Hawkins (W, 15-3) struck out eighth in her one-hit shutout.
O'Toole (L, 18-9) was similarly effective, allowing just one earned run on four hits to the nation's leaders in batting average (.363) entering the day. The redshirt junior struck out three and walked two in the outing.
Lauren Young registered Arizona's only hit of the day, a one-out double in the second inning.
After tossing a pair of perfect innings, O'Toole allowed a pair of singles to lead off the third. A Wildcat error would help the Ducks plate the first run of the game, but a diving catch in left by Mandie Perez helped Arizona limit the damage to just the single run.
The Ducks added to their lead with a solo homer from Sammie Puentes in the fifth.
The two runs would be enough to back up Hawkins' shutout.
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