NEW YORK (WFAN) —  Major League Baseball is very close to expanding its playoff format from eight teams to 10 for the upcoming season, according to CBSSports.com’s Jon Heyman.

If and when Major League Baseball and the players’ association come to an agreement, a second Wild Card team would be added in both the American League and the National League. Commissioner Bud Selig had set a March 1 deadline for the expansion to go into effect, and Heyman reports that an official announcement could be made by Thursday.

Fox Sports’ Ken Rosenthal similarly reported that the expansion was near completion. According to Rosenthal, the latest collective-bargaining agreement cemented that two additional Wild Card teams would be added no later than 2013, but Selig insisted that the new format should go into effect this season.

It is not yet determined how a new format would affect the start times of games in the final days of the regular season.

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