categorically wrote:
All time Junior list at 100m followed by best senior time
SC = still competing
1 9.97 Mark LEWIS-FRANCIS wind guage malfunction, never ran faster than 10.04 legal, tested positive for canabis and missed three drugs tests
2 10.01 Darrel BROWN 9.99 SC
2 10.01 Jeffery DEMPS 10.01 SC
2 10.01 Yoshihide KIRYU 10.01 SC
5 10.03 Marcus ROWLAND 10.03 SC
6 10.04 D'Angelo CHERRY 10.04 SC
6 10.04 Christophe LEMAITRE 9.92 SC
8 10.05 Davidson EZINWA 9.94
8 10.05 Adam GEMILI 10.05 SC
10 10.06 Sunday EMMANUEL 10.06
10 10.06 Dwain CHAMBERS 9.97 doped
10 10.06 Walter DIX 9.88 SC
13 10.07 Stanley FLOYD 10.03
13 10.07 DaBryan BLANTON 10.07 SC
13 10.07 Tamunosiki ATORUDIBO 10.07
13 10.07 Jimmy VICAUT 9.95 SC
17 10.08 Andre CASON 9.92
17 10.08 Justin GATLIN 9.79 doped
17 10.08 J-Mee SAMUELS 10.03 SC
17 10.08 Ramil GULIYEV 10.08 SC
21 10.09 A Melvin LATTANY 9.96
22 10.1 Stanley KERR 10.1
22 10.1 Francis OBIKWELU 9.86 SC
24 10.11 Harvey GLANCE 10.05
24 10.11 Tim MONTGOMERY 9.92 doped
24 10.11 Yohan BLAKE 9.69 doped
You really have to see the progression of most of these guys. Being a junior prodigy in sprinting does not make you a great senior sprinter. Most guys actually get slower as they grow in their 20s. Some improved a little bit then fell off. Some doped.