Wallace has spent the majority of his brief Major League career in the No. 6 spot (64 of 97 total at-bats), but he's hitting just .156 there. Wallace did, however, launch his first career home run on Tuesday, and Mills is hoping a change in lineup scenery can expedite his development.
"We're hoping -- whether it's pressure or something else -- that [Wallace] will get different looks down there," Mills said. "It's the same for Castro. We're just moving those guys around to try and get a different look, to see if they can get jump-started a little bit."
Though Castro has slumped at the plate for much of his rookie season, the catcher has turned into a force in September, hitting .333 with a .412 on-base percentage, justifying a move higher in the lineup.
"I try not to focus on that," Castro said. "You don't really try and look at anything extra, other than what you can control. I just take my at-bats as they come and focus in on them and that particular situation."
Castro went 0-for-3 and Wallace was 2-for-3 with a double in Friday's 4-2 loss in 11 innings to the Dodgers.