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Minor League Monitor - NL Central: Brett Jackson, Tyrell Jenkins, Jonathan Singleton and more...

Pittsburgh Pirates

Alex Dickerson - A- / 1B / 05-26-90

The Pirates highest pick to sign is off to a strong start. In 26 games, the 3rd rounder has hit .287 with a .202 ISO thanks to 11 doubles. His ISO+ is 149 so he is hitting well above the average NY Penn League hitter. He has struck out in just 14.5% of his plate appearances.

Chicago Cubs

Brett Jackson - AAA / CF / 08-02-88

Jackson is expected to make his big league debut this year. He has dominated at AAA batting .314/.403/.629. He could develop into a great top of the order hitter since he brings excellent on base skills to go with above average speed and power. The biggest problem he faces is making enough contact. He has struck out 28.2% of the time in AAA. A promotion to the majors will likely see that number rise and it's hard to have a strong triple slash when you strike out that often.

Milwaukee Brewers

Cody Scarpetta - AA / SP / 09-25-88

Scarpetta's strikeout rate and walk rate have both gone in the wrong direction but his ERA remains relatively low due to the weak contact his stuff produces. The Brewers hope was that Scarpetta would develop into a dominant innings eater for the top of their rotation but until he gets command of his pitches he is destined for the middle or back end of the rotation.

St. Louis Cardinals

Tyrell Jenkins - A- / SP / 07-20-92

Jenkins was seen as a bit of a risky high ceiling pick when he was taken 50th overall last year. The risk appears to be paying off as Jenkins may soon join Shelby Miller and Carlos Martinez among the list of young Cardinals prospects with Ace potential. In 9 starts, Jenkins has walked only 9 in 46 innings. The control is an excellent sign because as he learns to pitch he will lower the amount of hits he allows .

Cincinnati Reds

Dave Sappelt - MLB / CF / 01-02-87

Sappelt showed promise when he stole 47 bases in his first full season. 2010 saw a drop to 26 steals but 53 extra base hits and a .342 AVG spread across 3 levels finishing in AAA. With 99 games at AAA under his belt he has hit .316/.374/.464. All of the base stealing has gone away and he doesn't have big time power but he makes a lot of contact and should produce a better AVG than the .190 he has put up in 6 MLB games. He is an intriguing pick-up for owners in NL-Only leagues since he is playing everyday with Chris Heisey on the DL.

Houston Astros

Jonathan Singleton - A+ / 1B / 09-18-91

Singleton has cranked up the power since joining the Astros organization. After 49 plate appearances, he has a .283 ISO. He caused some concern with a slow start but has put his season together and is just as promising as he ever was. He should hit for a good average when he reaches the majors and it will be how much power he develops that will decide his ultimate value in fantasy. He should have at least 20 home run power, but if he can reach 30, he could have a season or two in the prestigious .300/30/100 club.