Brian Charles VAETH, Plaintiff-Appellant, v. MAYOR AND CITY COUNCIL OF BALTIMORE CITY, a municipal corporation; Board of Trustees of the Fire and Police Employees Retirement System of the City of Baltimore, a body politic and corporate; George Nilson, individually and in his official capacity as City Solicitor; James Levy, MD, individually and in his capacity as Medical Director; Frederick McGrath, individually and in his capacity as Hearing Examiner for the Fire and Police Employees Retirement System of the City of Baltimore; Thomas P. Taneyhill, in his capacity as Executive Director, Fire and Police Employees Retirement System of the City of Baltimore; Stephan G. Fugate, in his capacity as former Board Chairman, Fire and Police Employees Retirement System of the City of Baltimore; James T. Clack, in his capacity as Chief of the Baltimore City Fire Department, Defendants-Appellees, and Robert J. Sledgeski, in his capacity as President of IAFF Local 734 Baltimore Firefighters, Defendant