Sam Darnold is sidelined Monday due to mononucleosis and NFL Network reported the New York Jets don't expect their quarterback to return any time soon.
Darnold, per NFL Network, is expected to miss between 3-7 weeks with the illness. That would include the team's Week 4 bye week. If he misses three weeks, Darnold could be back Week 5.
Backup Trevor Siemian gets the start Week 2 against the Cleveland Browns on Monday night.
Head coach Adam Gase all but ruled Darnold out for Week 3 at New England, and the Jets have a bye in Week 4 before facing the Philadelphia Eagles the following week.
Because mono enlarges the spleen and puts it at a higher risk of rupturing in a contact sport, Gase said the team will not play Darnold until that risk subsides.