Later , when the 40 - man roster is full .
The team needs to add another player , it will move the severely injured player from the 15 - day DL to the 60 - day DL in order to open up a 40 - man roster slot .
Later , when the 40 - man roster is full and the team needs to add another player , it will move the severely injured player from the 15 - day DL to the 60 - day DL in order to open up a 40 - man roster slot .