USMNT GK Zack Steffen (knee) to miss Gold Cup

U.S. men's national team goalkeeper Zack Steffen will miss the Concacaf Gold Cup with a knee injury.

The U.S. Soccer Federation confirmed Wednesday that Steffen was injured during training on Tuesday.

Steffen, 30, departed training camp and returned to the Colorado Rapids to undergo further testing.

ESPN reported that Steffen is expected to be sidelined from four to six weeks.

The USMNT has upcoming friendlies against Turkey on Friday in East Hartford, Conn., and against Switzerland next Tuesday in Nashville, Tenn.

Gold Cup action begins on June 15 with a Group D match against Trinidad and Tobago in San Jose, Calif., followed by group games against Saudi Arabia (June 19 in Austin, Texas) and Haiti (June 22 in Arlington, Texas).

Steffen is the second U.S. netminder lost to injury, joining the Columbus Crew's Patrick Schulte (oblique).

The remaining goalkeepers on coach Mauricio Pochettino's training roster include incumbent starter Matt Turner (Crystal Palace), Matt Freese (New York City FC) and Chris Brady (Chicago Fire).