MANKATO, Minn. -- After cutting undrafted free agent AC Leonard last week, the Minnesota Vikings delved into offensive coordinator Norv Turner's past to find another tight end.

They signed sixth-year player Kory Sperry on Sunday afternoon, filling out their 90-man roster and reuniting Sperry with Turner, who coached Sperry for two seasons while he was the San Diego Chargers' head coach.

Sperry, who spent the last two years with the Arizona Cardinals, has caught nine passes for 152 yards and a touchdown in his career. He played all 16 games for the Chargers in 2011, starting four of those games, and caught four passes for 73 yards in 2010, his first season with Turner.

The Colorado State product got to work with the Vikings on Sunday afternoon, taking part in their indoor practice as thunderstorms chased the team from its practice field.