Baseball and Major League Baseball Players Association officials said Tuesday the concussion rules include neurological testing during spring training to establish a baseline to check against possible concussions during the regular season.
The plan also sets up an evaluation process following an injury and a seven-day disabled list on which players with a concussion could be placed. It sets protocols to be completed before players and umpires could return to the field.
The measures go into effect Thursday -- baseball's opening day -- and cover both the major and minor leagues.
"I believe that Major League Baseball is taking a major step forward on a vital shared goal with the MLB Players Association," baseball Commissioner Bud Selig said in a statement. "This policy, which reflects the collective expertise of many of the foremost authorities in the field, will benefit players, umpires and clubs alike, and I am proud of the spirit of cooperation that has led us to this result."