I feel that age is a very important factor when determining a prospect's status. I think that a player repeating a level, or being demoted a level ought to be significantly better than his competition. I think that a college junior or senior ought to perform significantly better than a draft-eligible sophomore, community college player, or high schooler at the same level. Many of us try to use the following rule as a guideline: Iowa - 24 years old Tennessee - 23 Daytona - 22 Peoria - 21 Boise - 20 Mesa -19 Dominican - 18 Those who are younger than that age and performing well is a significant prospect (if other factors back that up). If they are at that age and performing well, they are a slightly lesser prospect (unless other factors come into play). If they are older than that age, that player needs a solid excuse (Tommy John surgery, red-shirted in college, position change, etc.) for me to consider them a significant prospect. This rule seems to be more important in the upper levels of the minor leagues than the lower levels for the Cubs, since they often have rosters filled with more age-appropriate players than most organizations. The upper levels can be filled with roster-filler guys, major-league insurance guys, and AAAA guys. Here are all of the guys who are at least two years older than they should be for their levels (Age) (Possible explanation): Iowa: - Matt Craig (28) (AAAA guy) - Casey Fossum (31) (Major-League insurance) - John-Ford Griffin (29) (Roster Filler) - Micah Hoffpauir (29) (Major Leaguer with options) - Mark Johnson (33) (Major-League insurance) - J.R. Mathes (27) (Roster Filler) - Vince Perkins (27) (Free Agent Pickup with a possible future) - Luis Rivas (29) (Major-League insurance) - Bobby Scales (31) (Major-League insurance) - Brad Snyder (27) (Waiver-wire Pickup with a possible future) - So Taguchi (39) (Major-League insurance) Tennessee: - Robinson Chirinos (25) (Position-change) - Doug Deeds (28) (Roster filler) - Blake Lalli (26) (2-way guy in college, drafted as a 23-year old, about one level behind) - Marcos Mateo (25) (Acquired from Cincinnati who advanced him slowly) - Jeremy Papelbon (26) (Lefty who has moved slowly, drafted as a 23-year old) - David Patton (25) (Rehab - err sort of) Daytona: - Todd Blackford (24) (Currently injured and on the Peoria DL) - Jake Muyco (24) (Position-change) - Luke Sommer (24) (Position-change) Peoria: - David Macias (23) (Trying to master several positions) - Rebel Ridling (23) (Repeating Low-A - not a great indicator of success) - Austin Bibens-Dirkx (24) (Age-appropriate in '06 & '07 but '08 was a wasted year, he's building confidence in Low-A) - Josh Whitlock (23) (Drafted last year, numbers have not been good enough for a promotion) None of these players would appear on my Top 30 prospect list, with the possible exceptions of Marcos Mateo, Jeremy Papelbon, and maybe Blake Lalli. I would say that true prospects who haven't had major injury issues or changed positions will be within a year and a half of their "appropriate age for the level they play."