BALTIMORE (AP) - Chris Tillman pitched seven innings of three-hit ball in a duel with Hisashi Iwakuma, Nick Markakis hit his first career leadoff homer and the Baltimore Orioles beat the Seattle Mariners 1-0 Sunday for their fourth straight series win.
Tillman (8-5) struck out six and walked none to earn his first win since June 27. A second-round draft pick by Seattle in 2006, Tillman is 6-0 in six career starts against the Mariners.
Newcomer Andrew Miller worked a perfect eighth and Zach Britton got three outs for his 23rd save.
Iwakuma (9-6) allowed one run, five hits and two walks in 7 2-3 innings. He struck out seven.
The right-hander lost on the road for the first time in 15 starts since July 4, 2013. He was 9-0 over that span.
Iwakuma's most glaring error came against the first batter he faced, when Markakis hit a shot to right on a 3-2 pitch. Markakis had three hits and now has 1,501 for his career. He came within a triple of hitting for the cycle.
The victory was the ninth in 13 games for the AL East-leading Orioles, who won the season series from Seattle 5-2. It was the first time the Orioles won on a leadoff homer, according to the club.
Seattle put runners on the corners with one out in the second before Tillman struck out Mike Zunino and Brad Miller. That began a run of 14 straight outs by Tillman, a streak that ended when Kendrys Morales singled leading off the seventh.
Kyle Seager then hit into a 4-6-3 double play.
Tillman was 0-1 over his previous six starts despite allowing three runs or fewer in each of those games. The right-hander is 2-5 at home and 6-0 on the road.
Baltimore manager Buck Showalter opted to rest slugger Nelson Cruz, who was 1 for 28 since hitting his 28th homer on July 25.
Mariners: RF Michael Saunders (left oblique strain) had a light day with no hitting Sunday to get some rest. He will begin throwing in the outfield this week. ''He's getting better,'' manager Lloyd McClendon said.
Orioles: Ubaldo Jimenez (sprained right ankle) was scheduled to pitch for Triple-A Norfolk on Sunday night, his final rehabilitative assignment. He will join the team in Washington on Monday and travel with the squad to Toronto.
Mariners: After getting Monday off, Seattle sends Felix Hernandez (11-3) to the mound Tuesday at home against Atlanta.
Orioles: Baltimore takes a short trip south Monday for a makeup game against the Nationals. Rookie Kevin Gausman faces Washington's Tanner Roark.