Mike Marson, the left wing who showed so much improvement during training camp, has been assigned to Hershey of the American Hockey League by the Washington Capitals.

"I'm planning on coming back." Marson said. "I'm going to work and straighten out what has to be straightened out, polish up a few things. I think things have worked out better this time than in other years."

Marson signed a new contract in September, passing up a six-figure option year for a more equitable salary spread over four years. He reported in excellent condition and made considerable progress in such areas as checking, where he was weak before.

"There are still a few minor things about his game that he can work on." said general manager Max McNab. "We have tremendous confidence in Chuck Hamilton as a coach and we think we can help Mike a lot."

Left wing Hank Nowak, a free agent released earlier by the Boston organization, left camp after the Capitals decided not to sign him. Nowak played in most of the exhibition games, but did not prove any more effective than players already under contract.

Defenseman Robert Picard's strained back music was reported much improved. After treatment today, it will be determined whether he can play in Friday's opener against Pittsburgh.

Left wing Craig Patrick's sprained right ankle was pronounced 99 per cent fit. Defenseman Rick Green is still awaiting a final recommendation from Dr. P. M. Palumbo Jr. to put full stress on his injured right wrist.

Wingers Nelson Burton and Eddy Godin, who had been on trial with Hershey, will remain with that club. Center Denis Turcotte was shipped to Port Huron of the International Hockey League.