I know everyone at some point has heard the Jeter and Castro comparisons, I also know a lot, pretty much all of you have given up on Castro. But this should show about just how good he can be given time.
Starlin Castro first four seasons: .287/.326/.409, 611 hits, 31 HRs, 211 RBIs, 333/114 K/BB, 64 SBs
*Castro's 4th season is still in progress.
Derek Jeter first four season: .294/.354/.422, 588 hits, 39 HRs, 239 RBIs, 357/183 K/BB, 67 SBs
It's worth noting Castro came into the league as a 19 year old, Jeter as a 21 year old, so there's that.