Here are some short notes on just a few random minor league pitchers I have watched recently:
Brooks Brown in the Tigers AAA is a former 1st round pick. The righty has a 90 MPH fastball with a little bit of movement and a curveball. He throws too many pitches in the middle of the plate, but can get a lot of grounders if he can get it down. When I saw him, there wasn't much evidence he can. Brown has some real control issues, which is not a good combo with his mediocre stuff.
Helpi Reyes for the Jamestown Jammers can throw a curveball for a strike and get swings and misses on it when it is in the dirt. He throws pretty hard with a good fastball that he can locate low. Reyes also has a slider, but has less control over it. When I saw him, he got in trouble with walks.
Cody Wheeler of the Yakima Bears is a short lefty with a curveball, change (pretty good late movement, got whiffs), and fastball. Wheeler has a slow arm action and works pretty low with his fastball (you can probably can call it a sinker).
Victor Capellan is a drop down sidearmer from the Dominican Republic pitching for the Yakima Bears. He has good numbers even though he has no real idea where the ball is going. The pitches have good movement, both downward and sideways, and righties don't really stand a chance. It obviously doesn't look like he will be able out lefties.
Erik Jokisch for the Cubs AA is a lefty with a solid swing and miss changeup. He keeps the ball low, throws a ton of breaking pitches(looks like a curveball)/off speed. The fastball seems good enough, especially when he throws it high after starting low with off speed (pitching backwards).
Chris Manno of the Reds AA (came over in Johnny Gomes trade from Nationals) is a lefty reliever with a quirky delivery, in which he hides the ball behind his back and then throws sidearmed. It makes fastball look faster but I'm not sure how he will be able to get righties out (he did get one to fly-out on a fastball down the middle). The fastball stays high and I would like to see a breaking ball. He wasn't missing bats or getting many grounders.
Brady Wager in the Orioles New York Penn League affiliate is a righty at 91-93 MPH. He has no real secondary pitch though. Nathaniel Stolz of Beyond the BoxScore noted that he landed on a stiff leg and tended to rush his delivery.
Ben Snyder of the Rangers AAA was originally a 4th round pick in 2006. He is a little old to be considered a prospect and has a AAA lefty delivery (3/4 type with a LOOGY type release point). He doesn't throw hard, with a lot of breaking balls (one of them being a slow curve). When he threw his change in the dirt (especially to lefties) it was a pretty good pitch, but he was getting hit pretty hard.
Bryan Mitchell of the Charleston Riverdogs (Yankees affiliate) is a skinny right-hander with a good looking straight fastball and a big curve. He can miss some bats with it. Mitchell will also throw a rare changeup. It is pretty good stuff for a 16th rounder but the fastball command is why he isn't getting good results.
Chad Pierce of the Brewers class A can throw a soft slider type pitch for a strike. The fastball is not all that impressive for the righty but he got swings and misses on the curve in dirt. It is a pretty slow pitch and Pierce can also throw it for strikes. Pierce has a moving fastball that he can throw to both sides of the plate, although it usually doesn't get down. This could be dangerous, especially if it moves into lefties with power . The straight fastball also got him in trouble, he needs to keep that pitch high above the zone.
Chris Lamb is a big lefty with a good looking changeup that can get him whiffs from righties. He also has a moving fastball/sinker with a curve. The curve is his swing and miss pitch and he can throw it for strikes (and has confidence throwing it with 3 balls). Along with the straight fastball, it is a pretty deep array of pitches.
Drew Granier pitches for the Burlington Bees (A's class A) with Lamb. He has a big curve ball with 2 plane break (meaning it moves both horizontally and vertically). It is the right-hander's feature and favorite pitch. He likes to throw it in the dirt, but can also throw it for a strike. Granier can locate his fastball on the corners and really appears to have swing and miss stuff. His moving fastball can both tail in and tail away to hitters from both sides.
Su-Min Jung was on Rehab (that was his official roster status, he has pitched as high as class A Peoria) in Boise, a shortseason affiliate for the Cubs. He has a low 90s fastball, a big curveball and a moving fastball. Can throw the curve for strikes but doesn't hang it. It is certainly his best pitch. It has some nice late bite, especially when he throws it low. Jung was basically pitching backwards when I saw him. The moving fastball was more of a sinker type pitch in movement. He didn't have much control of it.