Waco police Sgt. W. Patrick Swanton told the Waco Tribune-Herald that an officer stopped Rhodes about 4 a.m. Friday for changing lanes without a signal on Spur 2 on the edge of downtown. Swanton said the officer smelled marijuana when he approached the driver's side window and found almost 6 grams of marijuana in a plastic bag under the front seat.
Swanton said the tampering charge arose from Rhodes trying to hide the drugs.
Coach Art Briles told the newspaper he would address the situation but had no other comment.
Rhodes made 10 catches for 157 yards as a freshman.