After the 1962 season, Raiders managing general partner F. Wayne Valley hired Al Davis as Raiders head coach and general manager. At 33, he was the youngest person in professional football history to hold the positions. Davis immediately began to implement what he termed the "vertical game", an aggressive offensive strategy inspired by the offense developed by Chargers head coach Sid Gillman. Under Davis the Raiders improved to 10–4 and he was named the AFL's Coach of the Year in 1963. Though the team slipped to 5–7–2 in 1964, they rebounded to an 8–5–1 record in 1965. The famous silver and black Raider uniform debuted at the regular season opening game on September 7, 1963. Prior to this, the team wore a combination of black and white with gold trim on the pants and oversized numerals.