Here is a look at my top-5. I'll add more later when I have more time.
1. Jay Bruce, OF
All he has done is hit and hit since last season. Excluding his 24 ABs at AAA, he has an OPS well above .950, and he is very young for his level. Has some trouble though Striking out, with a 32/87 BB/K rate.
2. Justin Upton, OF
He is making up for last years numbers with great numbers this year that are comparable to Bruce. He hasn't been as consistent though, he went a month without a HR. It is very close though, Upton has done better with his BB/K ratio.
3. Evan Longoria, 3B
36% XBH% to date isn't as impressive as Bruce's 50%, and doesn't have as much upside as Upton. What he does have is superior plate discipline, making him more likely to reach his potential.
4. Clayton Kershaw, LHP
111 Ks in 81.1 IP with only 42 BB and 2 HRA. More importantly, he has a 1.23 GO/AO ratio, and a .194 BAA, after a bad last outing. Age and GO/AO ratio make him my no. 1 pitching prospect.
5. Adam Jones, OF
Hitting 45% XBH in AAA. 23 HR, and an OPS of .967. He may be in the PCL, but Tacoma's stadium is actually favorable to pitchers. Of the top hitters, Jones has the worst plate discipline, striking out 94 times and walking only 29.
Park Factors: http://firstinning.com/pf/?type=basic&l ... eason=2007