The Baltimore Ravens have tweaked their offensive line, waiving tackle Scott Kooistra and signing guard Bryan Mattison from the practice squad, the team announced Saturday.
Mattison, who spent the 2009 season on Baltimore's practice squad, was on injured reserve for all of 2008. He originally signed with the New York Jets as an undrafted free agent in 2008.
The Ravens signed Kooistra in October, but he never saw the field this season after seven years in Cincinnati, where he appeared in 84 games, with only one start.
The Associated Press contributed to this report.