Originally Posted by Hoosier Red
There are a few exceptions to this rule.
If he's on the 40 man roster and someone who was on the 25 man roster before the post season is transferred to the 60 day DL, he could take that spot.
That's how the Reds got Chapman on the post season roster in 2010, I think Harang was transferred to make room.
HOWEVER, IIRC, it would have to be a position player transferred, you can't transfer a pitcher to the 60 man DL and have Hamilton take his spot.
Roster geniuses can correct any errors I make.
The Reds called Chapman up on August 31st that year, making him eligible for the postseason roster.