no one gets drafted as "Special Teams" position
what happens is
if your skills at your designated position are iffy
but the team still likes you and wants to keep you around
you'll get stuck on practice squad
then for some reason they need to call you up to the 45-man roster
in order to earn your check
they will put you on ST until you MIGHT be able to get in for garbarge time

some dudes only see kickoff action
some dudes only do extra points

i think the rams knew the outcome of this before they even drafted ddue and punked him
the rams used Sam and he dont e.n.o. it