Four Hillsboro pitchers combined to allow three hits in a 4-3 victory Saturday night at the Vancouver Canadians.
Vancouver, which has the best record in the Class A Northwest League, fell to 18-12.
Hillsboro is 16-14 and tied for second in the South Division with eight games left in the first half. Eugene leads at 17-13, and Boise is even with Hillsboro at 16-14.
The Hops are 1-5 this season versus Eugene, which has the tiebreaker if the two teams finish in a first-half tie.
Hillsboro is 2-1 against Boise and has the tiebreaker with the Hawks.
The Hops won't play Eugene or Boise again until the second half.
Boise has the edge if there is a three-way tie.
Luis Madero (1-0) started for the Hops on Saturday and went six innings, giving up three hits and three runs, one earned. He had one walk and five strikeouts.
Matt Peacock, Anfernee Benitez and Erbert Gonzalez worked the rest of the game for the Hops.
The Hops led 4-2 after one inning. Hillsboro batters Nos. 4-7 in the order — Pavin Smith, Camden Duzenack, Daulton Varsho and Tra'mayne Holmes — each had an RBI, with Duzenack getting a double, Smith and Varsho singles and Holmes a ground out.
Vancouver pulled to within 4-3 in the fifth.
Closer Gonzalez of Hillsboro came on to work the ninth. He walked the first batter, who moved to second and third on two ground outs. But Gonzalez got Matt Morgan on a swinging strikeout to collect his sixth save.
The second game of the five-game set is 1 p.m. Sunday.
The Hops and Canadians still have nine of their 10 regular-season matchups to play.
In other NWL games on Saturday: Eugene won 4-3 at home over Everett, and Boise went 10 innings at home against Tri-City before falling, 8-7.