Orioles 5, Rangers 3: Nate McLouth highlighted a four-run fifth inning with a two-run homer as visiting Baltimore evened the three-game series at one win apiece.
Rookie Manny Machado recorded two hits and an RBI while Chris Tillman posted his fifth win in six decisions for the Orioles, who defeated the American League West-leading Rangers for only the second time in 11 tries.
Machado snapped a 1-1 tie in the fifth with a one-out RBI triple and scored two batters later on J.J. Hardy's double. McLouth followed with a blast to right field for his first homer in 50 games this season.
McLouth got the Orioles on the board in the first inning without the benefit of a hit. After drawing a two-out walk from Scott Feldman, McLouth stole second, advanced to third on catcher Geovany Soto's throwing error and scored on a wild pitch.
Tillman (6-2) allowed three runs and six hits in 6 2/3 innings. The 24-year-old, who walked one and struck out seven, has yielded three earned runs or less in seven of his nine starts this year.
Two relievers bridged the gap to All-Star Jim Johnson, who worked a perfect ninth for his 38th save in 41 opportunities. Johnson pulled even with Tampa Bay's Fernando Rodney for the major-league saves lead.
Feldman (6-9) surrendered five runs - four earned - and seven hits over five frames en route to his third straight loss. It was the first loss in five career decisions against Baltimore for Feldman, who issued one walk and recorded four strikeouts.
Soto belted a two-run homer and Ian Kinsler added a solo shot for the Rangers, who are 1-1 on their 10-game homestand.
GAME NOTEBOOK: McLouth had not gone deep since July 17, 2011, while with Atlanta. ... Johnson is seven saves away from tying the franchise record of 45 set in 1997 by Randy Myers. ... Baltimore RHP Jason Hammel, who has not pitched since July 13 because of a right knee injury that required arthroscopic surgery, threw in the bullpen and fielded bunts before Tuesday's contest and may throw a few innings in a simulated game on Friday. ... Rangers RHP Koji Uehara, who is on the disabled list with a strained lat muscle, began his rehab assignment with Triple-A Round Rock on Tuesday, allowing one hit while striking out two in a scoreless inning.