Yes. The rules are if they are listed as questionable or worse they can be on your IR.
CONSTITUTION
Players must be listed as questionable or worse to be on the IR.
Only two players are allowed to be on IR at one time.
Only players in the playoffs are allowed to add and drop players during the playoffs. Once you are eliminated from playoff contention your roster is locked for the offseason.
Rosters must consist of:
QB - 2
RB - 3
WR - 4
TE - 2
K - 2
D/ST - 2
At all times or it will be considered and Illegal roster.