"I want him to have a little bit more time in the outfield in general," Wedge said, per The Seattle Times. "Whether it be left field or center field. Either way for me I think it works good. The reps in center field would just be a concern right now. I want to make sure he can do that."

Ackley, who was demoted to the minors in late May after hitting .205, is batting .411 (30 for 73) with two home runs, five doubles, 11 RBI and 15 walks in 17 games for Tacoma. Though, the Mariners continue to proceed with caution.

"It has to be able to translate up here," manager Eric Wedge said, per MLB.com. "I think his mindset is the biggest thing."

Nick Franklin has thrived at second base since Ackley's demotion, which will likely prompt Seattle to move Ackley to the outfield once he's recalled.

"He's been playing some center field, some left field," Wedge said. "We know he can play second base basically perfectly, too. That versatility only helps us and helps him."

Ackley was asked to be more aggressive in the minors, but is actually swinging at fewer pitches. Ackley has only offered at 30 percent of pitches at Triple-A, that's the second lowest rate in the minors. It's not clear if pitchers are being more careful with Ackley in Triple-A and not throwing him strikes, or if Ackley has been more selective.

Ackley is hitting .406/.519/.563 in 64 at-bats at Triple-A Tacoma. He hit just .205 in the majors earlier this year. 

Ackley has hit well in Triple-A since his demotion. In 14 games, he's hitting .417. He's being converted to outfielder in the minors to make room for Nick Franklin. 

Ackley hit .205/.266/.250 in 156 at-bats in the majors this year. 

With Nick Franklin playing well at second base, Ackley may need to switch positions to have a spot. Ackley is batting .429 over 13 games in the minors with two homers and eight RBI.