The Facts: Darnold has mononucleosis and is out for Monday Night Football against Cleveland.

Diehards Line: Expect him to miss more. The Jets have a bye in Week 4, which now seems fortunate. Head coach Adam Gase indicated QB Sam Darnold could miss multiple weeks, leaving Week 5 against the Eagles as a possible return date. Trevor Siemian will start in Darnold's absence but the team will need a backup for him.