The Raiders announced the deal Thursday to bring Hardy in as a tight end. The 25-year-old Hardy hasn't played football since high school.
The 6-foot-5, 250-pound Hardy averaged 8.0 points and 6.7 rebounds the past two seasons for the Titans. He previously played two seasons of basketball for Oral Roberts.
Hardy's father, Andre, played parts of three seasons in the NFL as a running back with Philadelphia, Seattle and San Francisco.