According to an MLB source close to the Chicago Tribune’s Phil Rogers, there’s a proposal being developed to add two wild-card teams to the playoffs with a provision to use an NFL-style tiebreaker based around head-to-head play to send teams into the playoffs rather than have a one-game elimination playoff (such as game 163 in years past).

Commissioner Bud Selig has previously confirmed that baseball is studying the possibilities to expand the postseason field, and there’s strong consideration that they may increase it to 10 teams as soon as 2011.

An expanded wild-card where two teams from each league play a best-of-three series may be impractical since it would have too much down time for the division winners.

Proposals being developed are to be presented in front of general mangers in November that call for a one-game, winner-take-all showdown and a best-of-three format.