In ranking Desmond the #4 prospect overall:

"Why he’s here: Once he stayed healthy for a full season, Jennings showed true five-tool talent. He has size, speed, strength, explosiveness and skills.

What he’ll be: Jennings has many similarities to current Rays center fielder B.J. Upton, but his hitting track record is more consistent.

When he arrives: The Rays have an outfield spot open presently for 2010, and Jennings should be a big league-ready, inexpensive solution."

1st seasons…
In 2003, BJ hit 302/394/445 as an 18 year old in the Sally League..and even got a taste of AA to a tune of 276/376/381. Pretty damn good for an 18 yr old SS.

In 2006, as a 19 yr old in ROOKIE BALL, Desmond his 277/360/390…and didnt get promoted.

2nd seasons…
BJ Upton spent more time in AAA and Tampa then in AA! As a friggin 19 yr old! In AA his line was 327/427/471. In AAA his line was 311/411/519. As a 19 yr old in the BIGS, his line was 258/324/409.

Jennings spent his 20 yr old season in the Sally League hitting 315/401/465.

I like Jennings a lot. BJ Upton was a machine offensively through the minors. His only season he didnt dominate was 2006 when he was going through defensive issues(getting thrown all over the field). BJ Upton was a stud in the BIGS in 2007, good in 2008, and putrid last season. Before we talk about consistentcy, let let him have more then 1 down year.
Desmond Jennings will be 23 next season. 2008 was BJ Upton 23 yr old season… 4 seasons after his Big League debut.