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The Ravens waived offensive tackle Scott Kooistra and signed guard Bryan Mattison from their practice squad today, a move predicated by an injury issue with starting right guard Chris Chester.
Chester was taken to the hospital Thursday night and missed practice yesterday after coming down with what head coach John Harbaugh called a "skin issue".
He is listed as questionable for Sunday's game against the Panthers, but his illness left the Ravens wanting to add depth to the interior of their offensive line.
As a result, they waived Kooistra, an eight-year veteran who the Ravens signed prior to their Week 5 game against the Broncos, and added Mattison.
Kooistra had not been active in any of the Ravens' five games since his signing.
Mattison, the son of Ravens defensive coordinator Greg Mattison, has spent the last two seasons on Baltimore's practice squad and has spent time as both an offensive and defensive lineman. This is his first time seeing action on a 53-man roster since coming into the NFL as an undrafted free agent in 2008.
If Chester is unable to play on Sunday, Tony Moll will start at right guard for the Ravens.
