After Thursday's 4-3 loss to the Rays, Ackley is 3-for-25 (.120) over the previous five games, as his season average dropped to .231.
"I felt good up until the last two days," Ackley said. "Up until then, I felt great. I felt I was seeing the ball really well. The last two days, I've kind of felt a little bit off. I feel great in BP, I feel good everywhere else. I think it's a matter of a couple of games I've got in a funk.
"We've faced a couple of tough pitchers. That doesn't make it any easier. I think it's a matter of time before everybody gets back on track."
Ackley hit .273 with a .387 on-base percentage as a rookie last season. His on-base percentage sits at .292 through this season's first month.
It's easy to forget the 2009 first-round Draft pick didn't arrive in the Majors until mid-June last year and is still learning his way.