SAN DIEGO — Right-hander Edwin Jackson pitched seven shutout innings and Adam Rosales hit a two-run homer off Drew Pomeranz in the bottom of the fourth inning on Monday afternoon as the San Diego Padres defeated the Boston Red Sox 2-1 at Petco Park.
The loss kept the Red Sox a game behind division-leading Toronto in the American League East race.
Jackson, who replaced Pomeranz in the San Diego rotation after the Padres traded the left-hander to the Red Sox on July 14, allowed four hits and two walks with 11 strikeouts. In his three previous starts, Jackson gave up 18 runs and 23 hits in 11 2/3 innings in his three previous starts.
The Padres’ shutout bid ended when Boston pinch-hitter Chris Young homered off Brad Hand on the left-handed reliever’s first pitch in the eighth. Hand immediately gave up a double to pinch-hitter Aaron Hill but worked his way out of the jam in unusual fashion.
Hill advanced to third on Dustin Pedroia’s grounder to shortstop Luis Sardinas over the second-base bag.
Hill then appeared to score the tying run when he raced home from third when Hand’s swinging strike-three pitch to pinch-hitter Sandy Leon bounced away from Padres catcher Derek Norris. But home plate umpire Tony Randazzo ruled the pitch hit Leon on the foot on the swing and sent Hill back to third.
Hand then struck out Xander Bogaerts to end the threat.
Brandon Mauer picked up his eighth save of the season for the Padres.
Pomeranz, who was 8-7 with a 2.47 ERA in 17 starts for the Padres and was a member of the National League All-Star team, fell to 2-4 with the Red Sox. Jackson is 4-5 this season and 4-4 with the Padres.
Rosales, who got a start at second for slumping Ryan Schimpf with Pomeranz starting, broke up a scoreless tie with a two-run, two-out homer in the fourth.
Pomeranz retired the first two hitters he faced in the fourth when Alex Dickerson grounded a single past Pedroia at second base.
Rosales then hit a high fly to left that landed in the seats just beyond the leaping reach of Red Sox left fielder Brock Holt at the wall. The home run was the ninth of the season by Rosales.
A leaping catch by Pedroia kept the Padres off the board in the third.
With one out, left-handed-hitting Travis Jankowski dragged his second bunt single off Pomeranz — making the Padres center fielder the only player in the major leagues with two bunt singles in back-to-back games this season.
Jankowski stole second with two outs when Wil Myers rocketed a line drive toward right center that Pedroia caught at the top of his leap.
Jackson faced three hitters above the minimum for the first six innings as the Red Sox stretched their scoreless innings streak to 15 innings. He also had 10 strikeouts for the ninth time in his career and the first time since May 17, 2014.
But Jackson walked Mookie Betts to open the seventh ahead of Hanley Ramirez’s ground single to left past the dive of Padres shortstop Luis Sardinas.
Jackson, however, got Jackie Bradley Jr. to bounce into a double play before striking out prized rookie Yoan Moncada for the third time to stretch Boston’s scoreless innings streak to 16.
NOTES: Boston RHP Koji Uehara, who has been out since July 20 with a right pectoral strain, is OK after his simulated game and could be activated after another session or two, Red Sox manager John Farrell said. “His return would be a big one,” Farrell said. … OF Andrew Benintendi will be fitted with a brace on his strained left knee Tuesday. He has been on the Red Sox disabled list since Aug. 25. … DH David Ortiz “is doubtful” to be used in the field during the three games in San Diego and Farrell said his play will likely be limited to late-game pinch hitting if needed. … Farrell said INF Travis Shaw will likely get a start in left field on Wednesday. … Although he had only three rehab games with advanced Class A Lake Elsinore before the minor league seasons ended Monday, CF Jon Jay is expected to join the Padres on Tuesday. Jay has been out since June 19 with a right forearm fracture. … 2B Jemile Weeks, who has been on the disabled list since May 7 with a right hamstring strain, is also rehabbing with the Storm but is not expected to rejoin the Padres in September. … RHP Tyson Ross threw on the side Monday and the Padres are still hoping he will make an appearance this season, although he will not have a rehab assignment.