"I see a lot of good stuff," Servais said. "The key for me is he's been walking a ton lately. Even though he wasn't swinging the bat great, he's still finding ways to get on base and realizing he can still help the team even without getting a lot of hits."
Aoki reached base three times in Monday's 4-3 win with a single, double and walk and scored the winning run after stealing third and scoring on a throwing error on the catcher. He added an RBI single and a walk on Tuesday.
"I think it's getting better, day by day," Aoki said through translator Antony Suzuki. "I feel a lot more comfortable and I'm just looking to stay positive from here on and get on base as much as I can."
The Mariners signed Aoki as a free agent because they loved his consistency, having hit between .285 and .288 in each of his first four seasons in the Majors while producing an on-base percentage of .353. His OBP was a healthy .448 over the past seven games thanks to his proliferation of walks.
"I think he went 35 or 36 at-bats without getting a walk and now you look up and his numbers are great," Servais said. "He's ahead of his career norm, percentage-wise [in walks]. He does a nice job. Being aggressive on the bases last night was a big play in the game and worked out well for us. He's starting to move in the right direction."
• As a team, the Mariners ranked third in the American League in walks with 89 after Tuesday's win, behind only Toronto and Houston.
• The Mariners bullpen entered play Tuesday ranked first in the Majors in opponent's batting average (.171), on-base percentage (.241) and WHIP (0.92) and fourth in ERA (2.41).
Greg Johns has covered the Mariners since 1997, and for MLB.com since 2011. Follow him on Twitter @GregJohnsMLB and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.