MLB.com Columnist

Jonathan Mayo

Breaking down the Rockies' 2015 Top 30 Prospects

Gray, Butler repeat atop list, with pair of '14 Draft picks joining Top 10

Breaking down the Rockies' 2015 Top 30 Prospects

A year ago, the Rockies had one of the best pitching prospect tandems in all of baseball in Jon Gray and Eddie Butler. Both were high up on the Top 100 Prospects list and both looked poised to contribute to Colorado's rotation sooner rather than later.

While the 2014 season didn't go quite as smoothly as hoped for either hard-throwing right-hander, it didn't change things one iota at the top of the Rockies' list. Gray and Butler are still ranked first and second, and both are among the top 40 prospects on the Top 100.

The more things change, the more they stay the same: Add in David Dahl as a repeat at No. 3. But there is some new talent. The 2014 Draft added two players to Colorado's Top 10 in Kyle Freeland and Forrest Wall, as well as four more scattered throughout the Top 30.

Rockies' 2015 Top 30 Prospects list

Biggest jump: Dom Nunez, C (2014: Unranked | 2015: 9)
Biggest fall: Sam Moll, LHP (2014: 12 | 2015: 23)

Best tools
Players are graded on a 20-80 scouting scale for future tools -- 20-30 is well below average, 40 is below average, 50 is average, 60 is above average and 70-80 is well above average.

Hit: Dahl (60)
Power: Ryan McMahon (55)
Run: Wall (70)
Arm: Emerson Jimenez (60)
Defense: Jimenez (60)
Fastball: Jairo Diaz (80)
Curveball: Butler (55)
Slider: Gray (60)
Changeup: Tyler Anderson (60)
Control: Butler (55)

How they were built
Draft: 22
International: 7
Trade: 1

Breakdown by ETA
2015: 5
2016: 8
2017: 10
2018: 7

Breakdown by position
C: 2
1B: 2
2B: 1
3B: 2
SS: 5
OF: 5
RHP: 9
LHP: 4

Jonathan Mayo is a reporter for MLBPipeline.com and writes a blog, B3. Follow @JonathanMayoB3 on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.