The 36-year-old Spikes has played 15 NFL seasons, including the past two with San Diego. He has started 215 of his 219 career games played, including all 32 with the Chargers. He has 1,737 career tackles, including 218 with the Chargers.
Spikes has never been on a playoff team. He earlier played with Cincinnati, Buffalo, Philadelphia and San Francisco. The Chargers missed the playoffs the past three seasons.
In a statement Thursday, Telesco called Spikes "a true professional and a class act."
Earlier Thursday, CBS Sports NFL Insider Jason La Canfora reported that Spikes was preparing to play in 2013 and continuing his career.