Major League Baseball commissioner Bud Selig has asked Jim Crane to agree to move the Astros to the American League if he's approved as owner.
Crane signed a sales purchase agreement in May to buy the team from Drayton McLane for $680 million, but Major League Baseball has yet to approve the deal.
The possible switch of leagues has kept the deal from being approved, according to the source.
Source: MLB Wants Astros To Move To AL