BALTIMORE -- Chris Davis hit his major league-leading 40th home run and Nate McLouth belted his first career grand slam, leading the Baltimore Orioles to an 11-8 victory over the Seattle Mariners on Friday night.
Davis hit a third-inning pitch off right-hander Aaron Harang that traveled 442 feet and landed on Eutaw Street. Davis joined Frank Robinson (49), Jim Gentile (46), Rafael Palmeiro (43) and Brady Anderson (50) as the only Orioles to hit 40 homers in a season.
Seattle has now lost four consecutive games after being swept by Boston to open a six-game road trip.
Baltimore starter Chris Tillman gave up six runs, which equaled a season high, and eight hits with five strikeouts and three walks in 5 1/3 innings. He is still unbeaten in five career starts against his former team.
Adam Jones went 2-for-4 with three RBIs, and Ryan Flaherty picked up three hits, including his seventh home run for the Orioles.
Seattle designated hitter Kendrys Morales went 4-for-4 with a home run. Humberto Quintero, Michael Morse and Michael Saunders also homered for the Mariners.
Harang lasted five innings and allowed seven runs and seven hits with one strikeout and two walks.
The Mariners pulled to 7-6 on a sacrifice fly by Saunders in the fifth off Troy Patton. However, McLouth's grand slam in the sixth put the game out of reach.
The Orioles took the lead in the first inning when Jones' bases-loaded double, which was bobbled by left fielder Raul Ibanez, resulted in three runs. Two batters later, Matt Wieters' sacrifice fly made it 4-0.
The Mariners cut the margin to 4-3 in the third on a two-run homer by Saunders and a two-out RBI single by Morales.
Davis then boosted the Orioles' lead to two runs with a solo shot to right field that was the 72nd in Camden Yarks history to land on Eutaw Street.
Flaherty provided a 6-3 lead in the fourth when he drove a ball that landed on the flat part of the left-field wall. The umpires eventually ruled it a home run after a brief review.
Quintero answered for Seattle with a leadoff homer in the fifth. However, Jones picked up his third RBI in the bottom of the inning with a single to center that scored Manny Machado.
NOTES: Roberto Alomar, who was Baltimore's starting second baseman from 1996 to 1998, was inducted into the Orioles Hall of Fame before the game. ... The Orioles' current second baseman, Brian Roberts, was placed on paternity leave to be with his wife, who was expected to give birth to their first child. ... Baltimore RHP Steve Johnson was activated from the 15-day disabled list. ...The Mariners held a closed-door meeting to discuss the team's meltdown the previous night in Boston when the bullpen surrendered six runs in the ninth inning of an 8-7 loss. "That was, to put it lightly, a huge loss," Mariners interim manager Robby Thompson said.