Showalter said a lot will depend on what happens with his bullpen over the next day or two. Arrieta appears to be the favorite to get the nod at this point. 

Arrieta was sent down after making four starts this year and going 1-1 with a 6.63 ERA. He was sent down to Triple-A Norfolk to work on his command and he displayed enough improvement to return in the bullpen. 

Perez has a deep hip bruise, and is considered day-to-day. Perez will not start Tueday, but is available if necessary. Perez is hitting .308/.324/.413 in 143 at-bats this season. 

It's not as if he has suddenly stopped hitting flyballs, like Dustin Pedroia and Eric Hosmer have. Kemp normally hits for the most power on balls that go to center field, and he hasn't hit many deep shots that way so far. Still, he has hit just 67 balls up the middle this season -- and that includes grounders -- so we're still looking at a pretty small sample.

As long as Kemp continues to put the ball in the air and avoid popups -- and he's been doing both at reasonable rates -- there's a chance for him to rediscover his power.

Pierzynski will bat eighth against Athletics starter Dan Straily. He's hitting .263/.297/.411 in 95 at-bats this year. 

Sanchez left his last start with reduced velocity, but has not been diagnosed with a specific injury yet. Sanchez has a 3.16 ERA in nine starts at High A this year. 

That's not to say Dylan Axelrod has blown him out of the water. His 4.13 ERA and 1.26 WHIP hardly suggest he's a mainstay. But considering he got the first crack at the job, he's unlikely to cede it to a pitcher who has done nothing to differentiate himself.

Of course, the point is moot if John Danks suffers a last-minute hiccup in his rehabilitation from shoulder surgery, but with the White Sox aiming for him to return to the starting rotation Friday, we've likely seen the last of Santiago as a starter for now.

Moustakas is hitting .178, with a .183 BABIP (a normal BABIP is around .290-.300). He's walking more, striking out less, and he's hitting ground balls at a lower rate than any time in his career. But he's only getting hits on 14 percent of his ground balls and he's continuing to pop up at a rate of about 18 percent. In short, Moustakas has been very unlucky. 

This is why I'm holding him in all my leagues and waiting for the inevitable turnaround. Moustakas is a very good hitter (let Ned Yost fire you up about it) and it's not like he's wildly swinging at pitches outside of the zone, or failing to show patience at the plate. It's ugly now, but Moustakas will continue to play every day and is due for a major correction in his stats. If you've held on this long to the bad, you might as well continue holding for the inevitable good. 

Carroll will play second and hit leadoff against Braves pitcher Tim Hudson. In 56 at-bats, Carroll is hitting .304/.361/.339. Carroll replaces Brian Dozier, who has been the team's normal second baseman and leadoff hitter recently. 

And Fantasy stardom may follow.

Is it really so far-fetched? We've been waiting for this guy to step up his power production for a couple of years now. In that 26-game stretch, he has nearly as many home runs as he hit in 145 games last year. And that's after ranking among the league leaders in home runs this spring. If that's not stepping it up, I don't know what is.

Not that I think Belt is going to hit 30 home runs or compete for NL MVP. But if you're still messing around with Todd Frazier or Paul Konerko at DH, it's time to upgrade.

Doumit is hitting .218/.289/.370 in 119 at-bats. He'll bat sixth against Tim Hudson. Since the Twins are playing a National League team, they are unable to use a DH.