Allen rushed once for eight yards and caught his only target for nine yards in Monday's 32-19 loss to the 49ers.
With a nine-yard catch late in the fourth quarter, Allen became the youngest player to register a touch on offense in the Super Bowl era at 20 years and 233 days. The rookie fourth-round draft pick out of Wisconsin added an eight-yard run on the following play, but he watched Breece Hall amass 21 touches before that point, so Allen's a distant second on the Jets' running back depth chart heading into Week 2 against the Titans.