Major League Baseball and the players union have added a new seven-day disabled list for players suffering from a concussions, the shorter DL is part of new protocols for dealing with those injuries.

The league and the union announced the protocols in a joint statement on Tuesday. They include mandatory baseline testing for all players and umpires and new steps for evaluating players who may have suffered the injury and for having them return to action.

The new guidelines will be in effect starting on Opening Day.

The new disabled list is in addition to the 15-day and 60-day DLs that already exist for players with injuries.

Each team will also have to designate a specialist who deals with mild brain injuries to evaluate players and umpires when needed.

Copyright 2010 by STATS LLC and The Associated Press. STATS LLC and The Associated Press contributed to this article. Any commercial use or distribution without the express written consent of STATS LLC and The Associated Press is strictly prohibited.

Watch & Listen LIVE