SEATTLE -- When August started, Travis Blackley was a reliever on the worst team in the majors. Now he's starting for the AL West leaders.
It was Blackley's first win since he was acquired in a trade with Houston on Aug. 14.
"It's a good feeling," Blackley said. "I'm really excited about the rest of the way."
It was more than enough run support for Blackley (2-1), who allowed three runs and five hits in his second start of the season.
"With all the injuries we've had, especially pitching injuries, anyone we can get that can come in and give us six innings and a quality start and give us a chance, that's an added bonus," Pierzynski said. "We've had a bunch of guys step in kind of from out of nowhere and done some good things for us."
Kyle Seager hit his 20th home run of the season for the Mariners, who have lost four in a row.
It was Blackley's longest outing since Oct. 2, 2012, after making 42 relief appearances for Houston this season. He had a similar experience last year, when he joined Oakland midseason and made 15 starts for the A's during their playoff run.
"Coming back here with another chase and another go at the postseason, a little older and I've been through it -- it's really not as hard when you've got this team behind you," Blackley said. "They play so well and they score a lot of runs most of the time."
Blackley was designated for assignment by Houston on Aug. 9. He was sent to Triple-A Round Rock after the trade, but he came up when right-hander Alexi Ogando went on the disabled list.
"I don't know what the Astros were thinking; I think they just wanted to try out young guys. I wasn't having the best season in that role, but it was a blessing in disguise," Blackley said. "I wanted to start all year, and they didn't have a spot for me to do that, and a spot opened up here, picked me up and I'm trying to run with it."
It was a much different night for Seattle starter Joe Saunders (10-13), who turned in another sluggish outing. The left-hander allowed seven runs and nine hits in seven inning to fall to 1-5 with a 7.71 ERA in his past seven starts.
"It was one of those weird nights where I thought I pitched better than the results," Saunders said. "I've just been having some bad luck."
The Rangers led 4-3 before Pierzynski hit a drive to right after Adrian Beltre was intentionally walked with two out and a runner on second in the seventh. It was Pierzynski's 15th homer in his first season with Texas.
Mitch Moreland added his 19th homer in the eighth, giving the Rangers an 8-3 lead.
Saunders got off to a slow start, and the Rangers took advantage. Saunders hit Craig Gentry leading off the game, and Andrus followed with a single. The runners moved up on Ian Kinsler's sacrifice before Beltre was walked intentionally to load the bases.
After Pierzynski bounced into a fielder's choice, Rios singled to center to lift Texas to a 2-0 lead.
The Mariners rallied in the third on Brad Miller's tying two-run single. Seager hit a drive to right with one out in the fourth, but that was all for Seattle.
Before the game, the Mariners activated OF Franklin Gutierrez from the disabled list and designated RHP Aaron Harang for assignment. ... Rangers OF Leonys Martin (sprained right ankle) was out of the lineup for the second straight game.