Clark (quadriceps) didn't receive a qualifying offer from Washington, so he will become an unrestricted free agent Saturday, per Matt Weyrich of NBC Sports Washington.
Clark is expected to miss 6-8 months after undergoing surgery on his left quadriceps Tuesday.
Clark was released from the Capitals training camp roster and assigned to AHL Hershey on Monday.
Clark (upper body) has been assigned to AHL Hershey, JJ Regan of NBC Sports Washington reports.
Clark sustained an upper-body injury during Washington's prospect tournament and will likely be held out of the Capitals' first few training-camp practices as a precaution, Tom Gulitti of NHL.com reports.