Major League Baseball and the players association are working diligently on a new labor agreement, which expires Dec. 11, 2011.

Among the several proposals discussed is the consideration of a radical realignment, according to ESPN.

The plan would move a National League team to the American League creating two 15-team leagues and eliminating the six divisions.

Interleague play would be scheduled throughout the season. Teams from each league would compete for five playoff spots.

According to the report, the Houston Astros would be the likeliest candidate to switch leagues, moving to the AL to foster a rivalry with the Texas Rangers. High-ranking executives cited by ESPN seem split on the viability of such a radical move, with one pegging it at less than 50%, while another ntoed momentum could build for it.

Earlier this year Commissioner Bud Selig entertained the idea of playoff expansion. Selig suggested the postseason field expand from eight to 10 teams, and this realignment would better facilitate a move to a 10-team playoff.