By Evan Bleier After spending more than two decades together in the broadcast booth at Fox Sports,Joe Buck and Troy Aikman have made the leap to ESPN and will call Monday Night Football during the upcoming NFL season. While he won’t be replacing them this season (unless he surprisingly retires for a second time), Tom Brady has already been signed to take over as Fox’s lead NFL analyst once his playing career is done and will eventually fill the top booth that Aikman and Buck once occupied. Speaking on a conference call on behalf of ESPN, Aikman and Buck were asked about the free-agency frenzy …