Dempster is 2-1 with one save while posting a 5.11 ERA in five career appearances against the Red Sox, including four starts, striking out 15 and walking 11 over 24 2/3 innings.
Rangers: Andrus expected to be back in lineup
After missing the last frame of Sunday's 7-6 loss in 10 innings to the Royals and all of Monday's 9-2 setback to the Red Sox, Elvis Andrus is expected to start on Tuesday. Andrus exited Sunday's game in the ninth inning with right shoulder soreness after getting thrown out at home plate in the seventh trying to score on a double by Michael Young.
Olt is also expected to be in the lineup on Tuesday. The right-handed-hitting Olt, who primarily played third base at Double-A Frisco before getting called up last Wednesday, will likely play first base when Lester starts for the Red Sox. He has two hits in seven at-bats with three RBIs and two walks during his callup.
Red Sox: Valentine gets support from team executives
The Red Sox improved to .500 with a 9-2 win over the Rangers on Monday night, but they're still nine games out of first place in the American League East and four games behind the Angels for the second spot in the AL Wild Card race. Yet general manager Ben Cherington and owner John Henry gave first-year manager Bobby Valentine votes of confidence before Monday's game.
David Ortiz got an injection in his injured right Achilles tendon early Monday night. The Red Sox are 9-11 since he was placed on the 15-day disabled list on July 18.
Ortiz did not work out or take batting practice before Monday's game like he had been earlier in the homestand, and there is no timetable for his return. He leads the Red Sox with a .316 batting average and 23 home runs.
Adrian Gonzalez went 3-for-5 with three RBIs in the Red Sox's win over the Rangers on Monday and is hitting a Majors-best .400 since June 23. His .418 batting average with runners in scoring position also leads the Major Leagues.
Pedro Ciriaco became the first player in Red Sox history to make his first career home run a go-ahead shot or game-tying blast as a pinch-hitter on Saturday, when he broke a 2-2 tie with a solo homer to lead off the eighth inning.
Despite going 0-for-4 with two strikeouts on Monday, Mike Napoli is still batting .500 with four home runs and 10 RBIs against the Red Sox this year. He has homered 15 times in 125 career at-bats against the Red Sox, once every 8.33 at-bats, the best all-time among players with at least 100 at-bats vs. Boston.
Mark Lowe pitched a scoreless ninth inning for Triple-A Round Rock in his fourth rehab appearance on Monday night. He had given up four runs in four innings during his three previous rehab outings, all with Double-A Frisco. Lowe has been on the disabled list since June 29 with a strained right intercostal muscle.