Jefferson was released by the Chargers on Monday, Aaron Wilson of KPRC 2 Houston reports.
The Chargers signed Jefferson from the practice squad to the active roster Thursday.
The Chargers released Jefferson on Thursday, Ian Rapoport of NFL Network reports.
The Chargers signed Jefferson to a contract Friday.
Jefferson is coming out of retirement and plans to play this upcoming season, Jordan Schultz of BleacherReport.com reports.
The Giants activated Jefferson (foot) from their injured reserve list Saturday ahead of Sunday's game versus the Commanders, Art Stapleton of The Bergen Record reports.
Jefferson (foot) was designated to return from IR on Monday, Dan Salomone of the Giants' official site reports.
The Giants placed Jefferson (foot) on injured reserve Saturday, Dan Salomone of the team's official site reports.
Jefferson (foot) has been ruled out for Sunday's contest against the Ravens, Dan Duggan of The Athletic reports.
Jefferson (foot) did not practice Wednesday, Dan Duggan of The Athletic reports.