From NHL.com:

Philadelphia Flyers defenseman Logan Pyett is out indefinitely after being diagnosed with sarcoma, a form of cancer, in his upper left leg, the Flyers announced Friday.

"The club asks that the media respect Logan and his family's privacy during this time," Flyers general manager Ron Hextall said in a statement. "Our heartfelt thoughts and prayers are with the Pyett family."

Pyett, 27, signed a contract with the Flyers' American Hockey League affilliate, the Lehigh Valley Phantoms, on Aug. 21, and he attended training camp with the Flyers. He had spent the previous two seasons playing in the Kontinental Hockey League. In 53 games last season with Vladivostok and Cherepovets, he had five goals and 15 points in 53 games.

A seventh-round pick (No. 212) of the Detroit Red Wings in the 2006 NHL Draft, Pyett spent five seasons in the AHL with the Grand Rapids Griffins and Connecticut Whale before moving to the KHL in 2013-14.