San Francisco 49ers

49ers release cornerback Chris Cook, sign wide receiver

The 49ers released cornerback Chris Cook, who played seven games for them last year before going on injured reserve with a hamstring tear. Cook, who was originially a second-round pick by the Vikings in 2010, had been one of several cornerbacks jockeying for position on the team’s depth chart.

The team filled his roster spot by signing rookie receiver Nigel King, who went undrafted out of the University of Kansas. King had 30 receptions for 537 yards and a touchdown last year with the Jayhawks.

The 49ers have been practicing without receivers Bruce Ellington and Isaac Blakeney, who have been dealing with muscle strains. Receiver Jerome Simpson missed the last two practices with an excused absence. He is expected back today.

The starters at cornerback currently are Tramaine Brock and Shareece Wright. On passing downs, Dontae Johnson has entered the field and Brock has been the nickel cornerback. The team also has Keith Reaser, Kenneth Acker, Marcus Cromartie, Leon McFadden and Mylan Hicks at the position.

Additionally the is waiting for safety Jimmie Ward, a nickel specialist, to come back from a foot injury.

Matt Barrows: @mattbarrows, read more about the team at