yeah only the top guys
listed at each position make it
i've worked out that 247-248 players arte guaranteed to be in every time and then it picks about 10 players at random from those just below the cut-off line.
from NCAA 08 off the top of my head:
QB = 12 or 13
RB = 13 or 14, basically one more guaranteed RB than QB.
FB = 11
WR = 21
TE = 11
OT = 20
G = 20
C = 11
DE = 20
DT = 18
OLB = 20
MLB = 14
CB = 20
FS = 11
SS = 11
K = 8
P = 8