The Minnesota Vikings released veteran tight end John Carlson on Wednesday after attempts to reach agreement on a restructured contract failed.
Carlson, 29, has a history of concussion problems and was reported to be considering retirement.
In 2013, Carlson played in 13 games and had 32 receptions for 344 yards and one touchdown. The third concussion of his career ended his season.
Carlson signed a five-year, $25 million contract with the Vikings in 2012 after three years with the Seattle Seahawks. He collected $9.55 million in guarantees during his two seasons in Minnesota, according to NFL.com.
The move frees up $2 million in salary cap space for the Vikings next season.
Carlson’s best seasons were his first two in the NFL when he had 55 and 51 catches with a combined 12 touchdowns in 2008 and 2009 for the Seahawks.