Not really, though. I explained how it would work in a non-PBP system. Observe:
Rookie season: 50 OVR, A POT
+2
2nd season: 52 OVR
+4
3rd season:56 OVR
+20
4th season: 76 OVR
+16
5th season: 92 OVR
and so on...
You could designate certain players "late bloomers," meaning they progress very fast, but not right away. The important thing is that his progression is entirely unrelated to the stats he puts up.