Former Gopher Erik Johnson out with knee injury.

Former one and done Gopher hockey player Eric Johnson will miss some time with a knee injury.

ST. LOUIS -- St. Louis Blues defenseman Erik Johnson will miss the first three days of training camp because of a knee injury.

Team president John Davidson said Thursday that Johnson hurt his right knee in a non-hockey-related incident.

Johnson will be re-evaluated over the weekend and his status will be updated before Tuesday's preseason game with the Dallas Stars.

Johnson was the Blues' first overall pick in 2006.