The Detroit Lions have filled the coaching vacancy created when defensive backs coach Tim Walton left to become the defensive coordinator of the St. Louis Rams by promoting Marcus Robertson, Justin Rogers of Mlive reports .
Robertson was hired by Detroit in 2012 as an assistant defensive backs coach. Prior to joining the Lions, he held the same title with the Tennessee Titans for five years.
A former safety, Robertson played 12 season for the Houston Oilers, Tennessee Titans and Seattle Seahawks. He was a First-Team All-Pro in 1993 and finished his career with 676 tackles and 24 interceptions in 162 games (144 starts).
Robertson will be the fourth new positions coach for the Lions in 2013. Detroit also promoted Jeremiah Washburn to take over the offensive line, while hiring Bobby Johnson and Curtis Modkins to coach the tight ends and running backs.
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