UNDATED (AP) — The Kansas City Royals and Toronto Blue Jays finished with the American League's best records during the regular season, but they find themselves trailing in the division series after dropping their openers.

KANSAS CITY, MO - OCTOBER 08: (L-R) Luke Gregerson #44 of the Houston Astros, Colby Rasmus #28 of the Houston Astros, Carlos Correa #1 of the Houston Astros, Jose Altuve #27 of the Houston Astros, and Luis Valbuena #18 of the Houston Astros celebrate defeating the Kansas City Royals in game one of the American League Division Series at Kauffman Stadium on October 8, 2015 in Kansas City, Missouri. The Houston Astros defeat the Kansas City Royals with a score of 5 to 2. (Photo by Jamie Squire/Getty Images)
The Astros celebrate their Game 1 win over the Royals (Getty Images).
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In Kansas City, Collin McHugh worked six innings and the Houston Astros hit a pair of solo homers in a 5-2 triumph over the Royals. McHugh gave up two runs and four hits in six innings before four relievers combined to blank the Royals the rest of the way. Oliver Perez entered the game in the eighth with the potential tying run at the plate before getting Eric Hosmer to hit a foul popup for the final out.

The Astros took a quick 2-0 lead in the first inning on RBI grounders by Colby Rasmus and Evan Gattis. Rasmus and George Spring added solo shots after Kendrys Morales homered twice to get the Royals within 3-2.

Jose Altuve was 3-for-5 with an RBI and a run scored for the Astros, who face the Royals in Game 2 on Friday.

Johnny Cueto will try to even the series for Kansas City. The Astros will counter with Scott Kazmir.

Robinson Chirinos and Rougned Odor homered off David Price as the Rangers downed the Blue Jays 5-3. Chirinos put Texas ahead 4-1 with a two-run shot in the fifth inning, but the Blue Jays got within 4-3 before Odor went deep to complete the scoring.

Price lasted seven innings but was reached for five runs, five hits and two walks while pitching on 11 day's rest.

Yovani Gallardo allowed two runs and four hits in five innings to improve to 4-0 with a 1.78 ERA in four career starts against Toronto. Keone Kela, Jake Diekman and Sam Dyson finished, with Dyson getting a save.

Neither team had its starting third baseman on the field by the end of the game. The Rangers had to take out Adrian Beltre in the third with a sore lower back, two innings before Toronto's Josh Donaldson came out. Donaldson was kneed in the head while sliding in an attempt to break up a double play.

Blue Jays slugger Jose Bautista had to leave the game after the eighth inning due to hamstring tightness.

Game 2 is Friday afternoon in Toronto, where Marcus Stroman will pitch for the Blue Jays against Rangers ace Cole Hamels. The Rangers have won Hamels' last 10 starts, scoring at least four runs each time.

Play in the National League Divisional series playoffs begins tomorrow with the Cardinals entertaining the Cubs, and the Dodgers hosting the Mets.

In news from the Cardinals' camp, All-Star catcher Yadier Molina is on the St. Louis roster for the NL division series against the Cubs. He'll be able to play wearing a splint to protect a strained ligament in his left thumb.

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