ALAMEDA -- Cornerback Nnamdi Asomugha, who signed contracts that earned him more than $60 million over the past five years, will sign for free Friday.

The ceremonial deal, announced Thursday by the Raiders, will allow Asomugha to retire with the team for which he played eight seasons after being drafted in 2003 out of Cal.

Asomugha, 32, last played for the 49ers, who released him Nov. 4.

A two-time All-Pro and two-time Pro Bowl selection in Oakland -- he was asked another time as an alternate but did not make the trip -- Asomugha saw his level of play drop dramatically after signing a five-year, $60 million contract with the Philadelphia Eagles before the 2011 season.

Although Asomugha's skill was as press cover corner in a man-to-man defense, the Eagles signed him despite playing a system heavy in zone defense. He was released after two years, earning $25 million in guarantees.

Asomugha played three games at a minimum salary for the 49ers this season before being released to make room for Eric Wright, who was coming off the injured reserve list.

A first-round draft pick (No. 31 overall), Asomugha had three shaky seasons before a breakout year in 2006 when he had eight interceptions on a 2-14 Raiders team and from that point on became one of the top cover corners in the NFL.

The Raiders signed Asomugha to an exclusive franchise tag paying him $9.5 million in 2008, then to a three-year deal worth $45.3 million in 2009, making him the NFL's highest paid player.

However, the deal included incentives that weren't reached in terms of playing time, and it was voided after the 2010 season, making him a free agent.

Asomugha, who will be joined at a Friday news conference by legendary Raiders cornerbacks Willie Brown and Lester Hayes and by current Raider Charles Woodson, is known for his philanthropic endeavors and community involvement.

Married to actress Kerry Washington, Asomugha and his wife are expecting their first child.