A state appeals panel affirmed a Cook County jury’s defense verdict in favor of a law firm sued for legal malpractice by a now-shuttered baseball league.The Northern League of Professional Baseball Teams sued Gozdecki, Del Giudice, Americus, Farkas & Brocato LLP and its associate Steven H. Leech in 2012, alleging they failed to include an exit fee within their league agreement.Without it, the plaintiff argued, the Northern League lost out on $4 million when four of its teams — the Fargo-Moorhead RedHawks …