mlb 05/19/08 12:14 PM ET Jonathan Mayo is a senior reporter for MLB.com.]]> In the bigs

As always, Lisa Winston's Movin' On Up is an invaluable tool. Two guys there worth discussing, one maybe for right now and one more for the future. The Reds called up Paul Janish when Jeff Keppinger went down. He got his first start on Sunday and went 3-for-3. That could lead to more playing time at short. The glove is ready for an everyday job, it's just a question of the bat. I don't think he's going to hit a ton, but if you're in an NL-only league, he might not be a bad choice if you need help, especially if he gets time in the suddenly red-hot Reds lineup.

It's unlikely that Angels reliever Jose Arredondo will help much now unless he can settle into a setup role, but you know how much I love the future closer possibilities. Arredondo had 10 saves before getting called up and he's still getting used to the relieving gig. Maybe he can help you out with some Ks in a pinch in AL-only leagues, but it's the potential of him becoming a closer in the future that should really pique your interest.

You can say the same thing about Chris Perez. I've written about him before, and he should be on your radar since it's becoming apparent that Jason Isringhausen may not have much left in the tank. He's certainly not first in line to get saves in St. Louis; he may not even be second. But now that he's in the bigs, if he can keep the walks down, he's going to get more opportunities to show what he can do.

A phone call away

At the end of April, Rockies third baseman Ian Stewart had an 0-for-26 stretch that dropped his average to .236. Since then, he's reeled off a 13-game hitting streak and has his average up to .289. He's hit .322 overall in May with six homers in 17 games. He's got a 1.209 OPS this month and looks ready to get another shot. The only question, of course, is where. They had him work on playing second last fall, but he's only played third this season. It might be time to start a "Free the Prospect" campaign for Stewart, who is only 23 years old. He can hit for average and power if he ever gets a legit shot, so watch the transaction reports closely.

When the Marlins got right-hander Eulogio De La Cruz, most thought he'd be a short reliever and eventually settle into a late-inning role in Florida's bullpen. But the Fish have him in the rotation at Triple-A Albuquerque, not exactly a friendly place to pitch. After getting knocked around for a 9.00 ERA in April, De La Cruz been locked in over three May outings, posting a 1.35 ERA with a .216 average against over 20 innings. The key for him has been command: He's issued just three walks and struck out 20 this month. De La Cruz should get a shot with the big club if he keeps pitching like this, even if he gets moved back to the 'pen.

A year away

Yes, he's served a suspension, and yes he's just 5-foot-7, but it's time to start looking at the Brewers' Angel Salome as a legitimate catching prospect. His average is up to .386. He's hitting .465 in 12 May games and has a .315 career mark. He's not going to hit for a ton of power, but he's just 21 and at Double-A. If you could have one of your catchers be a cinch to hit .300 every year, you'd take it, right?

When the Orioles started Chris Tillman in Double-A, it automatically put him on the fast track. Just 20 years old, he certainly hasn't had trouble with the leap, going 4-0 with a 2.41 ERA over eight starts. The Eastern League is hitting just .169 against the big right-hander. He's been even better in May, with a 1.72 ERA and .151 batting average against over three starts. Tillman's been walking a few too many, but considering his age, don't be too concerned. He'll be a good one not too long from now.

Down the road

When Sean Doolittle came out of the University of Virginia, he was considered to be a guy who would hit for average and not power. Granted, it's just the California League, but it may be time to reassess that evaluation. The first baseman is leading his league with 12 homers and 42 RBIs while ranking second with his .369 average. He's been striking out a little too much, perhaps the reason why he hasn't been promoted yet, but when you hit .429 in May, people notice. At this point, you have to think he's got a good shot at spending the second half of the season in Double-A.

Fellow 2007 draftee Jake Arrieta is also positioning himself for a promotion to Double-A. The Orioles prospect has a 1.74 ERA and 59 strikeouts on the year, good for second and first, respectively, in the Carolina League. Hitters have managed just a .140 batting average against the TCU product. The only thing holding him back has been walks -- 25 in 51 2/3 innings -- but he's been so tough to hit that his WHIP is still under 1.00. His command has also improved in May, limiting the walks to five over three starts. If that trend continues, the Eastern League should be in his sights soon.

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