The traffic stop occurred in Morristown. Police claimed the car was filled with smoke and they smelled marijuana. Harris, Davis and a third person were charged.
Harris, an All-American cornerback, was cut by Oregon in 2011 after he was busted for marijuana possession in Fresno, California.
Both players had signed with the Jets over the winter. Davis, a linebacker, starred at Southern Florida.
A total of 34 NFL players have been arrested for possession of marijuana or other drugs since 2008.