Photos: Behind-the-scenes of Donald Penn's retirement with the Silver and Black
After 14 years in the NFL, Donald Penn visited the Las Vegas Raiders Headquarters to sign a one-day contract to officially retire as a member of the Silver and Black.

Tackle Donald Penn waits to sign a one-day contract to retire as a member of the Las Vegas Raiders.

A special Raiders' alumni chair in the room where tackle Donald Penn signs a one-day contract to retire as a member of the Las Vegas Raiders.

Tackle Donald Penn's son waits for his dad to sign a one-day contract to retire as a member of the Las Vegas Raiders.

Tackle Donald Penn's daughter waits for her dad to sign a one-day contract to retire as a member of the Las Vegas Raiders.

Tackle Donald Penn's dad wears a custom jersey as his son signs a one-day contract to retire as a member of the Las Vegas Raiders.

Las Vegas Raiders Head Coach Jon Gruden hugs tackle Donald Penn before Penn signs a one-day contract to retire as a member of the Las Vegas Raiders.

Tackle Donald Penn signs a one-day contract to retire as a member of the Las Vegas Raiders.

Tackle Donald Penn sits in Cox Studios after signing a one-day contract to retire as a member of the Las Vegas Raiders.

Tackle Donald Penn sits in Cox Studios after signing a one-day contract to retire as a member of the Las Vegas Raiders.