NFL: Players, owners agree on opt-out guidelines, more to open camps

Jacksonville Jaguars defensive end Josh Allen (41) enters the field with his team before a game against the Los Angeles Chargers at TIAA Bank Field on Dec. 8, 2019, in Jacksonville. (JAMES GILBERT/Getty Images/TNS)
Jacksonville Jaguars defensive end Josh Allen (41) enters the field with his team before a game against the Los Angeles Chargers at TIAA Bank Field on Dec. 8, 2019, in Jacksonville. (JAMES GILBERT/Getty Images/TNS)

NFL training camps are set to open after the league and the players’ union reached agreement on several issues, including future salary cap mechanisms and how players can opt out of the upcoming seaso…