Nakajima played three innings at second base in a Minor League game on Saturday, and three at shortstop. Melvin was managing the big league club during this time, but said reports indicated Nakajima simply didn't look at ease at second.
"It was just something we wanted to try out, and that was the place to do it," he said. "When you go over to a different position, sometimes it's a little uncomfortable. I know he's comfortable at short, so we just wanted to take a look. He was good about doing it, and whether or not we do it again, I'm not sure."
It's highly unlikely Nakajima gets any playing time at second in a Cactus League game, with the position already being shared by five candidates, and the A's won't be apt to try him out there in a regular season game until he picks up more experience.
Nakajima started at shortstop on Sunday and went hitless with a walk in three at-bats, lowering his average to .150. Twice he put the ball in play on the first pitch.
"There's a possibility because I've struggled at the plate that I'm being overly aggressive," Nakajima admitted after the game through his translator. "When it's a strike I attack the ball early in the count. A takeaway is I'm actually really able to see the ball clear right now."
"It appears to me like he's getting more comfortable," Melvin said. "Certainly a nice three-hit day goes a long way for your confidence, and I know that day, when he gets a couple hits, it will be welcomed. He seems like he's on his way to one."
Melvin's club only has six spring games remaining though, and with each passing day it seems more likely that Jed Lowrie will get the starting nod at shortstop on Opening Day. Still, the A's are likely to keep Nakajima on the big league roster.
Jane Lee is a reporter for MLB.com. Read her blog, Major Lee-ague, and follow her on Twitter @JaneMLB. This story was not subject to the approval of Major League Baseball or its clubs.