BOSTON (AP) — Danny Jansen hit a two-run homer, Travis Shaw had a solo shot and the Toronto Blue Jays held off the Boston Red Sox 8-7 in the opener of a doubleheader Friday.The Blue Jays, pushing for a playoff spot, have won three straight and seven of nine. Shaw went 3 for 4 with a double off the top of right field wall and single, Rowdy Tellez had two singles with a sacrifice fly and Randal Grichuk added a two-run single.Yairo Muñoz went 3 for 3 with hit a two-run homer and RBI double for the Red Sox. They have lost five in a row, nine of 12 and fell a season-high 15 games under .500 for the first time since 2014.The Blue Jays had built an 8-4 edge before Boston rallied with three runs in the sixth.A.J. Cole (2-0) pitched an inning of scoreless relief and Anthony Bass got three outs in the seventh and final inning for his fifth save. Zack Godley (0-4) was the loser.BRAVES 7, NATIONALS 1, 1st gameATLANTA (AP) — Ronald Acuña Jr. homered twice, Dansby Swanson added a two-run shot and Atlanta beat struggling Washington in the first game of a doubleheader.The defending World Series champion Nationals have lost seven consecutive games. The NL East-leading Braves have won five in a row.Nationals fielder Juan Soto was scratched less than an hour before the game because of a sore left elbow.Darren O’Day (3-0) pitched a scoreless fifth. Austin Voth (0-5) was the loser.TWINS 2, TIGERS 0, 1st gameTWINS 3, TIGERS 2, 2nd gameMINNEAPOLIS (AP) — Marwin Gonzalez singled home Willians Astudillo in the eighth inning, and Minnesota rallied to beat for a doubleheader sweep.Astudillo started on second base with the eighth inning considered an extra inning due to the seven-inning doubleheader rule. Gonzalez hit a grounder up the middle and Detroit center fielder Derek Hill, making his major league debut, bobbled the ball, allowing Astudillo to score easily.Sergio Romo (1-1) pitched a perfect seventh and Trevor May picked up his second save in four chances as Minnesota won its fourth straight game. Joe Jimenez (1-3) allowed Gonzalez’s hit to take the loss after Gregory Soto blew a save in the seventh.In the opener, Polanco and Josh Donaldson hit back-to-back homers to lead off the bottom of the first inning, and Randy Dobnak (6-2) bounced back with five scoreless innings. Matt Boyd (1-5) allowed consecutive leadoff homers for the third time in less than a month. He also gave up back-to-back home runs to the Chicago White Sox to start games Aug. 12 and 17.ROSTER MOVESBefore the first game, Minnesota placed outfielder Max Kepler on the 10-day injured list with a left adductor strain. Manager Rocco Baldelli said the injury is considered minor and Kepler is likely to return after the 10 days expire.The Twins selected the contract of Rooker, the 35th overall pick in the 2017 draft by Minnesota, to take Kepler’s spot on the active roster. Rooker has hit .267 with 54 home runs in 259 career minor league games.“He hits the ball very hard,” Baldelli said. “He can hit the ball very far when he does it the way he wants, and he has good at-bats. ... We’re facing some tough lefties coming up who have been very good against, especially, left-handed hitters. To be able to pencil Rook’s name in there is very nice.”MINNEAPOLIS (AP) — Jorge Polanco and Josh Donaldson hit back-to-back homers to lead off the first inning, and Randy Dobnak bounced back with five scoreless innings to help Minnesota beat Detroit in the first game of a doubleheader.Dobnak (6-2) gave up four hits, a walk and struck out four batters in his second straight start against the Tigers. He surrendered a season-high six runs and 12 hits in 4 1/3 innings at Detroit in his last outing.Taylor Rogers worked the seventh and final inning for his eighth save in 10 chances.Detroit starter Matt Boyd (1-5) allowed consecutive leadoff homers for the third time in less than a month. He also gave up back-to-back home runs to the Chicago White Sox to start games on Aug. 12 and 17.(backslash)REDS 4, PIRATES 2, 1st gamePITTSBURGH (AP) — Luis Castillo pitched six strong innings to pick up his first victory in nearly a year and Cincinnati beat Pittsburgh in the first game of a doubleheader on Friday.Castillo (1-5) struck out eight and walked two to earn his first win since Sept. 13, 2019. A 15-game winner and an All-Star last season, he had dropped seven straight decisions. Nick Castellanos hit his 11th home run for the Reds, a solo shot off Steven Brault (0-2).