The Raiders have announced, via Twitter, that they have signed Boller.
He does not yet appear on the team’s web site, either on the transactions page or on the roster.
Boller spent the 2009 season with the Rams, after spending 2008 on injured reserve with the Ravens. In all, Boller was in Baltimore for six years. He started 42 games over five seasons, including all 16 in 2004.
In Oakland, he’ll presumably compete with JaMarcus Russell and Bruce Gradkowski for the starting job. Boller’s final year in Baltimore was also Raiders offensive coordinator Hue Jackson’s first of two years with the Ravens.
UPDATE: The move now appears on the transactions page.