Arizona made a bit of history Sunday in Seattle, Washington.

Outfielder Tanner O’Tremba delivered the game-winning hit while right-handed pitcher Trevor Long delivered three solid relief innings on the mound as the Wildcats—now 21-7 on the season and 9-3 in league play—downed the Washington Huskies 7-6 in extra innings.

The RBI single from O’Tremba in the 11th restored an Arizona lead that had been earned early in the afternoon but lost in the eighth. Long, pitching the ninth inning and both extras, held the Huskies scoreless on just three hits to close the door.

The win gave the Wildcats a three-game sweep, the first time the program has done that in Seattle. Ever.

Long’s excellence on the mound for Arizona dropped his ERA to just 1.17 on the season. Starting pitcher Anthony Susac worked three innings for the Wildcats and allowed just two runs (one earned) on four hits; he did not factor into the decision.

Arizona took the first meeting on Friday 8-3. It turned around Saturday and won 6-2. The Wildcats had to work for this one, but they got the job done nonetheless. Arizona is 2-0 in extra innings this season. It’ll play a mid-week game against Arizona State on Tuesday a 6 p.m. and then gear up for a weekend series against Washington State at Hi Corbett Field starting next Friday.

They currently sit atop the Pac-12 standings and are winners of four straight.