March 22, 2018 2:11 pm Johnny Manziel Works Out at USD NFL Pro Day Former Heisman Trophy winner and NFL quarterback Johnny Manziel continued his comeback attempt by participating in Thursday’s Pro Day at the University of San Diego. US & World Videos 1:00 Three dead in apparent murder-suicide in Lowell 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 2:50 Community mourns Billerica police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students'