Third baseman Kyle Seager is the latest first-year player riding a hot bat, as he's on a nine-game hitting streak during which he's batting .500 (18-for-36).
Mariners manager Eric Wedge said Seattle is still trying to figure out what it's got with Seager.
"It's still too early to tell," Wedge said. "Like with a lot of these guys, he's still getting his feel for this level, and we're still getting our feel for him. You've got to allow him to go out there and struggle to get it going, have some success, let the league make some adjustments and see how they react to it. We're still in the middle of all that."
Seattle's hitters will face a former Mariner, Joel Pineiro, who is hoping to reclaim a spot in the Angels rotation after a demotion to the bullpen.
In his last start against the Orioles, Pineiro (5-6) did not factor in the decision, but felt he made strides in recovering the hard sinker that is the foundation of his success. He lasted six innings, giving up four earned runs on nine hits with no walks and two strikeouts.
Pineiro is shooting for his first win since July 9 when he beat the Mariners in Anaheim, going seven innings and yielding three earned runs on 10 hits and a walk, with seven strikeouts.
"It's all about staying on top," Pineiro said. "Hopefully, my stuff is sharp. I was really happy with it last time out. I didn't get hit hard until the homer [by Baltimore's Adam Jones]. I was encouraged by how it went."
Angels: Winning ways aided by offensive outburst
Winners of seven of their last nine, the Angels have cut the American League West deficit to three games behind the first-place Rangers.
In seven of their last eight games, the Angels have scored at least five runs and collected 10 hits.
The Angels have also homered in 18 of their last 19 games, totaling 29 dingers during the stretch.
Their home/road homer differential is the largest in the Majors: 72 on the road as opposed to just 48 at Angel Stadium of Anaheim.
Howie Kendrick has homered in five of his last six games. He is batting .419 (18-for-43) over his past 11 games with 10 extra-base hits, 13 runs and 10 RBIs.
Reliever Bobby Cassevah has pitched seven scoreless outings in his last nine appearances.
Mariners: Beavan looks to get back on track
Blake Beavan (3-4) gets the nod in the series opener against the Angels.
The 22-year-old right-hander will be making his 10th career start.
He finished with a no-decision in his last outing, allowing three runs on eight hits over six innings against the Indians.
Over his last three starts, he is 0-2 with a 7.27 ERA, surrendering three homers in two of the last three contests. In his first six big league starts, Beavan was 3-2 with a 2.83 ERA.
Ichiro Suzuki has 50 multihit games this season, which is fourth in the American League.
Brandon League has allowed just four earned runs over his last 34 1/3 innings.
Beavan is 1-0 with a 1.88 ERA in two starts against the Angels this season. He has struck out three batters and walked none in 14 1/3 innings.
The Angels are 8-4 against the Mariners this season and 2-3 in Seattle. They have won six of the last seven meetings.