I have heard rumors about every position but DB coach and ST coach. DB the only name I have heard is Brian's coaching matrix that includes Greg Jackson. I have not heard any other candidate floated - missing any? Or is Jackson the guy? This assumes Manning returning would not put him in the secondary (i.e. he could go do LB, and Mattison DL). Are there any other names floating around?
Here is a 9 min video on Jackson if interested. He is the assistant to the secondary coach in San Fran.
Jackson joined San Francisco after having spent eight years coaching in the collegiate ranks. In 2010, he was the nickel back/assistant linebackers coach for a University of Wisconsin team that finished the year ranked seventh in the nation with an 11-2 record.
Prior to joining the Badgers, Jackson coached at Tulane University, serving as the linebackers/kickoff team coach (2009), the safeties/kickoff team coach (2008) and the defensive backs coach (2007). Jackson spent three seasons as the defensive backs coach at Louisiana-Monroe (2004-06), where he coached All-Sun Belt Conference defensive back Chris Harris, who led the country with seven interceptions, in 2004. He also spent one year as the defensive backs coach for the University of Idaho (2003).