The Baltimore Ravens placed rookie S Christian Thompson (knee) on Injured Reserve and elevated S Anthony Levine to their 53-man roster, it was announced Saturday.

Levine, who has spent the entire season on the Ravens’ practice squad, was on the Packers’ practice squad for the majority of his first two seasons (2010-11). He has not appeared in any NFL games.

Thompson, a fourth-round pick in 2012, appeared on special teams in seven contests this season.