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Here is a look back at the Diamondbacks' Top 10 Prospects lists for the last decade - what can we learn something about the players who became successful major leaguers? Terrero, Hairston, Quentin, Drew, Upton, Parker All rankings are taken from Baseball America, and stats listed are Batting Average/On-Base Percentage/Slugging Percentage.
2000 Stats
1. John Patterson, P (22) AA/AAA: 10.0K/9, 2.5K/BB, but 5.18 ERA
2. Jack Cust, OF (21) Hi A: .334/.450/.650, 145K/96BB
3. Byung-Hyun Kim, P (21) AA/AAA: 12.5K/9, 2.96K/BB, 2.19 ERA
4. Jeremy Ward, P (22) HiA/AA: 9.8K/9, 2.79K/BB,  7 Saves
5. Nick Bierbrodt, P (21) AA/AAA: 7.4K, 1.46K/BB, 5.58 ERA
6. Alex Cintron, SS (21) HiA: .307/.333 /.391
7. Rod Barajas, C (24) AA: .318 /.354 /.488
8. Luis Terrero, OF (19) Rookie: .287/.365/.474, 91K in 272 AB
9. Ben Norris, P (22) HiA/AA: 7.4K, 1.71K/BB, 4.23 ERA
10. Geraldo Guzman, P (27) Back after an 8 year layoff
2000: A decent list - Patterson, Cust, Kim, Cintron, and Barajas all turned into solid major leaguers, although injuries cut short the careers of Patterson and Kim.  Patterson was ranked #1 despite a high ERA, but the excellent strikeout and K/BB rates showed his potential.  Jack Cust at #2 was already showing his skill set - great power, great on-base rates, high strikeouts, and poor defense.
2001 Stats
1. Alex Cintron, SS (22) AA: .301/.336/.404, 32 Errors
2. Jack Cust, OF (21) AA: .293/.440/.526, 150K/117BB
3. Luis Terrero, OF (20) A: .245/.288/.355, 28 SB, 91K
4. John Patterson, P (23) Injured - Tommy John surgery
5. Jerry Gill, SS (18) Rookie: .225/.266/.286
6. Brad Cresse, C (22) A/AA: .312/.398/.600, 62K/23BB
7. Jeremy Ward, P (23) Injured - Elbow surgery
8. Chris Capuano, P (22) A: 9.3K/9, 2.33K/BB, 2 HRA in 101 IP
9. Bret Prinz, P A/AA: 10.5K/9, 4.65 K/BB, 27 Saves
10. Jose Valverde, RP (21) A: 13.1K, 2.17K/BB, 18 Sv, 3.95 ERA
2001: Many repeaters from the 2000 list, plus Chris Capuano and Jose Valverde make the Top 10.  John Patterson undergoes Tommy John surgery, and is out for over a year.  Luis Terrero and Jerry Gil, two great tools prospects, make the Top 5, despite mediocre results to this point.  Catcher Brad Cresse has a great debut at High Desert, but slows down at AA. Surprisingly, two players who just missed the Top 10 were Lyle Overbay (.927 OPS between A/AA) and Junior Spivey (.895 between AA/AAA).
2002 Stats
1. Luis Terrero, OF (21) A/AA: .296/.321/.468, 96K/7BB
2. Mike Gosling, P (21) Did not play
3. Scott Hairston, 2B (21) Rookie:  .347/.432/.588
4. Jack Cust, OF (22) AAA: .278/.415/.525, 160K/102 BB
5. Lyle Overbay, 1B (25) AA: .352/.423/.528, 100 RBI
6. Jose Valverde, RP (22) AA: 15.7K/9, 2.67 K/BB, 3.92 ERA
7. Jesus Cota, 1B (20) Rookie: .368/.476/.625, 52K/56BB
8. Lino Garcia, OF (17) Rookie: .243/.333/.400
9. Jason Bulger, P (23) Did not play
10. Brad Cresse, C (23) AA: .289/.373/.483, 116K/44B
2002: I'm not sure if a hitter could rank #1 today after a 96K/7BB season, but Luis Terrero pulled it off in 2002.  Terrero did finally get some major league ABs from 2003-2007, but still had poor OBPs and K/BB ratios. Mike Gosling is ranked #2 after being drafted out of Stanford.  Scott Hairston, Jack Cust, and Lyle Overbay are the best hitters in the system. Jesus Cota puts up a 1101 OPS in Rookie ball, but that will drop to only 766 the following year in the California league. Lino Garcia was another 5 tool prospect that struggled as he moved up the ladder.
2003 Stats
1. Scott Hairston, 2B (22) A/HiA: .345/.429/.603, 22 HR, 98 RBI, 99R
2. Mike Gosling, P (22) AA: 14-5, 3.13 ERA, 6.2 K/9, 1.85K/BB
3. Lyle Overbay, 1B (26) AAA: .343/.396/.528, 19 HR, 109 RBI
4. John Patterson, P (25) AAA: 10-5, 4.23 ERA, 8.3K/9, 2.31 K/BB
5. Brandon Webb, P (23) AA/AAA: 10-7, 3.17 ERA, 7.2K/9, 0.2 HR/9
6. Edgar Gonzalez, P (20) A: 14-8, 2.63 ERA, 6.8K/9, 0.3HR/9
7. Sergio Santos, SS (19) Rookie: .272/.367/.520, 28 E
8. Chad Tracy, 3B (22) AA: .344/.389/.486
9. Brian Bruney, P (21) A/A: 1.93 ERA, 10.1K/9, 0.3HR/9, 10Sv
10. Luis Terrero, OF (22) AA: .286/.342/.442, 18SB, 22CS
2003: More advanced players on this list, and many became successful major leaguers.  Mike Gosling has a good won-loss record and ERA in AA, but the strikeout rate and K/BB ratio are not that impressive.  Webb has much better peripherals, but is ranked 5th.  Sergio Santos shows good power, but also commits too many errors at SS.  Overbay continues to hit well, and Chad Tracy has a solid AA season.
2004 Stats
1. Scott Hairston, 2B (23) AA: .276/.345/.469 - missed 2nd half
2. Sergio Santos, SS (20) HiA/AA: .278/.347/.395
3. Dustin Nippert, P (22) A: 6-4, 2.82 ERA, 9.0K/9, 0.4HR/9
4. Chad Tracy, 3B (23) AAA: .324/.372/.456, 52K/41BB
5. Adriano Rosario, P (19) A: 9-5, 2.86 ERA, 6.7K; became Tony Pena
6. Conor Jackson, OF (21) A: .319/.410/.533, 60 RBI in 68G
7. Carlos Quentin, OF (21) Did not play
8. Brian Bruney, P (22) AA/AAA: 8.5K/9, 1.94K/BB, 26Sv
9. Edgar Gonzalez, P (21) AA/AAA: 10-9, 3.69 ERA, 5.4K/9, 0.3HR/9
10. Mike Gosling, P (23) AAA: 9-12, 5.61 ERA, 5.9K/9, 1.59K/BB
Sergio Santos was being advanced aggressively through the system, but is showing signs of struggling at AA.  19 year-old Adriano Rosario turned out to be 22 year old Tony Pena after a Dominican visa controversy. Conor Jackson puts up a .943 OPS in his first season, while fellow draftee Carlos Quentin sits out with elbow surgery.
2005 Stats
1. Carlos Quentin, OF (22) HiA/AA: .332/.435/.549, 21HR, 89 RBI
2. Conor Jackson, OF (22) HiA/AA: .324/.406/.512, 17HR, 91 RBI
3. Sergio Santos, SS (21) AA: .282/.332/.461 - shoulder surgery
4. Jon Zeringue, OF (21) HiA: .335/.374/.552, 53K/14BB
5. Greg Aquino, P (27) AAA: 6.37 ERA, 5.8K/9; NL: 3.06 ERA, 16Sv
6. Chris Snyder, C (24) AA: .301/.389/.520, 57K/46BB, 15 HR
7. Josh Kroeger, OF (22) AA/AAA: .331/.385/.587, 19HR, 87RBI
8. Jamie D'Antona, 3B (22) HiA/AA: .294/.328/.480, 52K/18BB
9. Tony Pena, P (23) AA: 5.44 ERA, 7.5K/9, 1.0BB/9
10. Matt Chico, P (21) HiA/AA: 3.90 ERA, 8.9K/9, 2.35K/BB
Quentin and Jackson dominate in A and AA, and Chris Snyder emerges as a prospect.  Josh Kroeger hits well, but can't find a place to play.  Low walk rates for Zeringue and D'Antona may be foreshadowing their upcoming struggles.
2006 Stats
1. Stephen Drew, SS (23) HiA/AA: .346/.430/.633, 18HR, 70RBI
2. Conor Jackson, OF (23) AAA: .354/.457/.553
3. Carlos Quentin, OF (23) AAA: .301/.422/.520, 21HR, 89RBI, 98R
4. Carlos  Gonzalez, OF (20) A: .307/.371/.489, 18HR, 92RBI, 86K
5. Dustin Nippert, P (24) AAA: 2.36 ERA, 7.4K/9, 2.3K/BB
6. Miguel Montero, C (22) HiA/AA: .326/.382/.562, 26HR, 95RBI
7. Garrett Mock, P (22) A: 14-7, 4.18 ERA, 8.3K/9, 1.7BB/9
8. Matt Torra, P (21) LoA: 10 IP, 10K - biceps tendinitis
9. Micah Owings, P (23) HiA: 2.45 ERA, 12.3K, 1.9BB/9
10. Sergio Santos, SS (22) AAA: .239/.288/.367, 108K/34BB
2006: Strong seasons from Stephen Drew, Conor Jackson, and Carlos Quentin put them at #1-3. Carlos  Gonzalez and Miguel Montero also emerge as big time prospects.  Sergio Santos has a tough time in AAA.
2007 Stats
1. Justin Upton, OF (19) A: .263/.343/.413, 12 HR, 15 SB
2. Chris Young, OF (23) AAA: .276/.363/.532, 21 HR, 17 SB
3. Carlos  Gonzalez, OF (21) HiA/AA: .289/.348/.543, 99RBI, 116K/37BB
4. Alberto Callaspo, 2B (23) AAA: .337/.404/.478, 27K/56 BB
5. Miguel Montero, C (23) AA/AAA: .286/.373/.461, 17HR
6. Micah Owings, P (24) 16-2, 3.33 ERA, 7.2K/9, 2.55K/BB
7. Mark Reynolds, 3B (23) HiA/AA: .318/.401/.633, 31HR, 98RBI
8. Dustin Nippert, P (25) AAA: 13-8, 4.87 ERA, 8.3K/9, 2.5K/BB
9. Tony Pena, P (25) AA/AAA: 5-1, 1.35 ERA, 7.3K/9, 13Sv
10. Brett Anderson, P (19) Did not play
2007: Justin Upton does well as a 19 year old in A ball, and takes the #1 spot.  Chris Young, acquired from the White Sox in the JVazquez trade, is at #2.  The batting average is a little low for the PCL, but the power, speed, and defense are promising.  Mark Reynolds shows great power, and Tony Pena is shifted to the bullpen. Micah Owings and Dustin Nippert continue to show major league potential.
2008 Stats
1. Carlos  Gonzalez, OF (22) AAA: .288/.336/.478, 109K/38BB
2. Jarrod Parker, P (19) Did not play
3. Brett Anderson, P (20) A/HiA: 11-7, 3.07 ERA, 9.3K/9, 1.6BB/9
4. Max Scherzer, P (23) HiA/AA: 7-4, 2.87 ERA, 11.1K/9, 3.9BB/9
5. Gerardo Parra, OF (21) A/HiA: .313/.357/.425, 71RBI, 26SB
6. Emilio Bonifacio, 2B (23) AA: .285/.333/.352, 105K/38BB, 41SB
7. Aaron Cunningham, OF (21) HiA/AA: .308/.375/.509, 16HR, 28SB
8. Chris Carter, 1B (21) A: .291/.383/.522, 25HR, 112K/67BB
9. Reynaldo Navarro, SS (18) Rookie: .250/.274/.283
10. Barry Enright, P (22) A/HiA: 15IP, 0 ER, 17K, 5BB
2008: Carlos  Gonzalez takes the #1 spot, despite some concerns about his plate discipline. Jarrod Parker is drafted out of high school and takes the #2 slot. Brett Anderson makes his debut at HiA and struggles a little, but then pitches very well at Class A South Bend. Max Scherzer shows impressive strikeout rates, and a trio of 21 year olds, Gerardo Parra, Aaron Cunningham, and Chris Carter make their Top 10 debuts.
2009 Stats
1. Jarrod Parker, P (20) A: 12-5, 3.44 ERA, 8.9K/9, 2.5K/BB
2. Gerardo Parra, OF (21) HiA/AA: .286/.358/.416, 28SB
3. Daniel Schlereth, P (22) Rookie/A: 1.50 ERA, 12IP, 20K, 6 BB
4. Mark Hallberg, MI (23) HiA: .283/.357/.368, 28K/30BB
5. Wade Miley, P (22) LoA: 4.91 ERA, 11 IP, 11K, 5B
6. Kevin Eichhorn, P (18) Rookie: 2.2IP, 2K, 1BB
7. Cesar Valdez, P (23) HiA/AA: 13-8, 3.14 ERA, 7.9K/9, 2.2BB/9
8. Billy Buckner, P (25) AAA: 4.95 ERA, 5.3K/9, 3.3BB/9
9. Collin Cowgill, OF (22) LoA/A: .264/.366/.479, 12HR, 78K/37BB
10. Reynaldo Navarro, SS (19) Rookie: .258/.323/.385, 77K/25BB, 38E
2009: Probably the weakest Top 10 list of the decade.  Parker is a solid #1, but no one else has impressive stats.
2010 Stats
1. Jarrod Parker, P (21) HiA/AA: 3.14 ERA, 8.8K/9, 0.2HR/9
2. Bobby Borchering, 3B (19) Rookie: .241/.290/.425; 27K/5BB
3. A.J. Pollock, OF (22) A: .271/.319/.376, 10SB
4. Brandon Allen, 1B (23) AA/AAA: .298/.373/.503, 85K/50BB, 20HR
5. Chris Owings, SS (18) Rookie: .306/.324/.426, 25K/3BB
6. Mike Belfiore, P (21) Rookie: 2.17 ERA, 8.5K/9, 2.0BB/9, 0.3HR/9
7. Marc Krauss, OF (22) A: .304/.377/.478, 21K/14BB
8. Ryan Wheeler, 1B (21) LoA/A: .361/.462/.540, 32K/42BB
9. Colln Cowgill, OF (23) A: .277/.373/.445, 49K/29BB
10. Matt Davidson, 3B (18) LoA: .241/.312/.319, 75K/21BB
2010: Again, the stats are not that impressive, but this group has a lot of potential.  7 of the Top 10 were taken in the 2009 draft.  Borchering started off slowly, but then had 2 HR, 4 2B, and 10 RBI in 6 playoff games.  Allen shows good power and has a chance to be the starting major league 1B in 2010. Ryan Wheeler and Marc Krauss have good offensive seasons, while Matt Davidson starts at Low A Yakima right out of high school, and predictably has some struggles. Conclusions Most of the good Diamondback hitters put up great numbers in the hitter-friendly Pacific Coast League - Conor Jackson (1010 OPS), Carlos Quentin (1004), Scott Hairston (968), Justin Upton (958), Jack Cust (936), Lyle Overbay (919), Chris Young (896), Miguel Montero (896), Chad Tracy (840), Stephen Drew (802).   Properly adjusting these AAA stats is critical to projecting how Diamondback AAA hitters could perform in the majors. Among the pitchers, the ones who have performed well in the Majors - Brandon Webb, Max Scherzer, Brett Anderson, Jose Valverde, John Patterson - all had good strikeout rates and K/BB ratios, and did a good job in preventing home runs. The lists also show the difficulty in projecting players who are still in the very low levels of the minors.  Many players had nice seasons in the rookie or short-season levels, but struggled as they moved up the ladder.  Players with high K/BB ratios often can be identified as ones who will struggle against better competition. In a future article, we will look at some methods of projecting major league performance from minor league stats.