[Nunyer]

Originally Posted by RchW

I think you're misinterpreting the real life DL rules. A player placed on the 15 day DL cannot play for 15 days period. Same with the 60 day DL. What you say above can't happen IRL.

Possible I am mistaken... and that the wikipedia page that I referenced to confirm before making my original post was wrong as well... but...

Disabled list

If a major league player cannot play because of a medical condition, he may be placed on the 15-day disabled list (DL). This removes the player from the 25-man roster, freeing up a space, but he is ineligible to play for at least 15 consecutive days. Players on the 15-day disabled list are still a part of the 40-man roster. An injured player may also be placed on the 60-day disabled list to remove the player from the 40-man roster as well, with the condition of being ineligible to play for 60 consecutive days.

Players placed on the 15-day disabled list may be moved to the 60-day list at any time, but not vice versa. Players may be placed on either disabled list retroactively for a maximum of 10 inactive days and may remain on either list for as long as required to recover. During this 10-day period, a player's status is said to be day-to-day, indicating that the team is in the process of deciding whether the player must be placed on either DL or is healthy enough to return to active service. Injured players may not be traded without permission of the Commissioner nor may they be optioned to the minors, though they may be assigned to a minor league club for rehabilitation for a limited amount of time (30 days for pitchers, 20 for non-pitchers).
In 2011, a 7-day disabled list was added specifically for players who have suffered a concussion. This was instituted to allow players who may recover from their concussions quickly to be removed from the active roster and replaced for a shorter period of time than 15 days. A player who is still suffering from concussion symptoms at the 15-day mark is automatically transferred to the 15-day DL. Both the brain injury and the player's recovery need to be verified by team and league doctors; the list is not intended for non-concussion injuries.

Source:
Major League Baseball transactions - Wikipedia, the free encyclopedia