According to court records, Za'Darius Smith was pulled over on Sept. 29 -- just days after the Packers' loss to the Eagles -- in Racine, Wisc. after cops say he was going 21 MPH over the speed limit.
The records say when the officer pulled over Smith, who's car passengers included teammates Rashan Gary and Kingsley Keke, he smelled a strong odor of marijuana.
The records say after the officer searched the car and found three blunts and a vaping cartridge ... Smith took ownership of them, saying, "I'll put it on me."
Records show Smith was hit with citations -- NOT criminal charges -- for speeding and possessing marijuana ... and the Packers players were then allowed to leave.
Smith is due in court next week to deal with the matter.
Smith could now be subject to NFL discipline under the league's personal conduct policy.