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8/6/2013 7:45 P.M. ET

A's welcome hitter-friendly change in Cincinnati

CINCINNATI -- Caught in an offensive funk, the A's are perhaps in dire need of a change of scenery following a 10-game homestand.

They got it Tuesday in Cincinnati, home to one of baseball's most hitter-friendly confines in Great American Ball Park.

The park is rather cozy, as short dimensions combined with the shortage of foul territory provide a hitters' haven on most days. A's manager Bob Melvin is hoping that proves true for at least his players during a quick two-game stay.

"Teams know before they get here how it plays," Melvin said, "that it's typically a good place to hit."

The A's endured their ninth shutout of the season on Sunday and fourth in their last 20 games, a span during which they hit just .218 with 67 runs scored, averaging out to 3.4 runs per game. That's well below their season average of 4.4, which ranked eighth in the American League entering the day.

Following Cincinnati, the A's will trek across the border to Toronto for four games at Rogers Centre, which also happens to be a likeable place to hit. Melvin thinks his team could benefit from keeping this in mind, even though there might be pressure to do too much.

"Especially since we've been struggling offensively," Melvin said. "I want them to think, 'Yeah, this is a good place to hit.'"

Jaso likely to move to 15-day DL due to concussion

CINCINNATI -- Still experiencing concussion symptoms, A's catcher John Jaso remained in the Bay Area on Tuesday while his teammates opened a six-game road trip in Cincinnati, and there are no plans for him to rejoin them.

"Not yet," manager Bob Melvin said.

It's been 12 days since Jaso was placed on the seven-day concussion disabled list, which likely means he'll be transferred to the 15-day DL this week.

This is the third concussion of Jaso's career, though the backstop has said many times that he never before experienced such lasting symptoms until now, which includes buzzing in his ear each time he wakes.

"He continues to improve as far as how he feels after riding the bike and all," Melvin said, "but still until we actually get him into baseball activities, there's really no way of knowing how to forecast his schedule."

Jaso had a .415 on-base percentage in the 16 games before he was sidelined, production that has since been missing at catcher, where replacement Stephen Vogt has hit .188 with a .229 on-base percentage in 11 games spanning two stints with the A's this year.

Callaspo looks to prove himself with first A's base hit

CINCINNATI -- Perhaps A's fans are still waiting to see what they have in Alberto Callaspo, who is hitless in his first 10 at-bats since being traded to Oakland from the Angels with just a .087 clip to his name since the break.

But his new teammates and manager already know all about his ability.

"He's hit the ball very hard a couple times and hasn't had anything to show for it," manager Bob Melvin said. "When you're with your new team, you want to get that first hit out of the way and show everyone what you have to offer. But he has. Everyone knows, has played enough against him to know he's a professional guy from both sides of the plate."

Callaspo will continue to share duties with Eric Sogard at second base, where Melvin plans to stick to a pretty strict platoon. However, having an everyday player such as the versatile Callaspo around also means Melvin can let some of his other infielders rest every now and then.

Rest isn't exactly in Josh Donaldson's vocabulary, as the third baseman has played in all but two of the A's 112 games this season. And even though his offensive numbers have dropped in recent weeks, in the midst of an 11-for-56 stretch, Donaldson still isn't tiring. At least he doesn't look like he is, Melvin said.

Still, an off-day may be on the horizon for the third baseman. Sort of.

"We try to monitor him pretty closely," Melvin said. "There are always a couple of players on each team they rely on to play every day. He is one of those guys we expect to be out there every day. He wants to be one of those guys as well, but maybe giving him a DH day coming up here quickly could probably help too."

When that happens, Callaspo will be at third, the position he manned on an everyday basis for the Angels before last week's trade.

"He'll get plenty of at-bats and not just at second base," Melvin said. "We still feel like he's a very good fit here, even though he doesn't have anything to show for it offensively yet."

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.