"The 49ers would like to thank Shawntae for his eight years of service to the organization and the Bay Area community," said GM Trent Baalke.
Spencer, who is 30, was drafted by the 49ers in the second round of the 2004 NFL Draft out of Pittsburgh. He had 345 tackles, 11 interceptions and 3 forced fumbles for the team.
Eric Branch of the San Francisco Chronicle notes the following on Twitter:
Shawntae Spencer played 87 defensive snaps in 9 games in 2011. Was inactive for 5 of last 8 games, including both playoff contests
The release saves $3.3 million on the 49ers' cap.