First, only a 60-DL stint opens up a spot on the 40-man, the standard 15-day doesn't. Second, I think you put a player on the 15-day DL towards the end of ST, but you can't use the 60-Day DL until spring training. Third, when using the 60-Day DL you have to fill the open 40-man spot immediately. Since Swarzak is a reliever, if he is working out by the beginning of March and throwing with out pain he will probably be good to go by the time the season starts. If it isn't until mid-March he will probably be DL'ed and sent to extended ST for rehab.