Simpson is the focus of a drug investigation.
According to reports, police confiscated a package containing 2 1/2 pounds of marijuana that was being shipped from California to Simpson's Kentucky home.
When police showed up at the house on Tuesday in a controlled delivery, a woman, Aleen Smith, accepted the package and Simpson was discovered inside along with teammate Anthony Collins.
Police asked to search the home and found a further six pounds of marijuana along with paraphernalia.
Simpson and Collins were then detained by police, but no arrests were made and the investigation is being continued by federal and state officials.
Simpson is in his fourth year in the NFL and has eight catches for 180 yards on the season. Collins is also in his fourth season and has started 16 of the 33 games he has played in.
Collins is also active for the Bengals.