Marvin Miller labels Bowie Kuhn's declaration that the free-agent system has served mainly to make the strong teams stronger "straight poppycock," but for the say of the day, listen to Lyman Bostock:

"If I don't do well the rest of April, I'm going to ask Mr. Autry not to pay me for the month."

Bostock, a .336 hitter in 1977 and .323 in '76 for Minnesota, left the Twins for re-entry in November with Gene Autry's Cal Angels - longtime security at $450,000 a year. So? So going into last night's game at Seattle - he benched himself the night before - Bostock was batting .051 as an Angel: two hits in 39 at-bats.

If he doesn't snap to, he say Autry can withhold his paycheck, or give it to charity. Bostock's April salary should be something above $50,000 - so he would be giving up darn near triple his full year's pay for 1977.

If the NFL Players Association can help it - and it signed a $191,000 contract with Secretary of Labor Ray Marshall yesterday - the Job Corps will double in size over the next 12 months, and 13-year Redskin Brig Owens will help see to it. Owens will administer the athletes' role in the program, aided by Olympic track star Wyomia Tyus coordinating the women, in efforts to promote and build the program, which currently has 61 centers with a capacity of 22,000 economically disadvantaged youth 16-21 . . . Owens' former teammate, center Dan Ryczek - a Fairfax-areas construction entrepreneur in the off-season - is back with George Allen. The L.A. Rams obtained the Virginia grad from Tampa Bay for an undisclosed draft choice yesterday. That and the Rams' signing of former Packer sub Carlos Brown to overload the QB corps of Haden-Ferragamo-Gabriel could further presage the projected Ram swap, including a quarter-back, for the Buc's first pick in the draft . . . Harvey Martin, whose face is seen more in Dallas media than Cowboy buddy Roger Staubach's, emerged from his "gross" orthodontic ordeal in which he had his jaw cracked and wired shut six weeks not only as Thoroughly Handsome Harvey but a trim 220 pounds. The Super Terror, you can bet, will be back at 245 or so when he goes back to sacking as he did to QBs a club-record 23 times last year . . .

Virginia Tech, which tried and failed to get into the ACC, is exploring entry into the Metro Conference in place of ACC-bound Georgia Tech. Former ACC member South Carolina also is a candidate to help make it a Metro Eight . . . The all-time NCAA Division I field-goal accuracy record in basketball, .547 by the 1974-75 Maryland Terps, still stands - Arkansas finished '77-78 at .546. And the ACC led all conferences the past season with .509 as nationwide, Division I players upped the record for the 2th time in 30 years, to .473 . . . Russ Potts, assistant athletic director/promotions at Maryland who explored cuse and found it wanting, says the the athletic director vacancy at Syra-word from U. of Missouri that he is one of three finalists (from among 33 candidates) for athletic director there: "No comment." Either way, he has beaten out Gale Sayers and former Mizzou football coach Al Onofrio, eliminated hopefuls . . .

Scott LeDoux, who fought Leon Spinks to a draw Oct. 27 in sharpening Spinks to beat Muhammed Ali next outing, has buried the hatchet with promoter Don King, whom he berated from the ring at Annapolis after he "wuz robbed" on a decision in the King-ABC late, un(?)lamented U.S. Boxing Championships. "Scott LeDoux has come home intoned King after signing the Minnesotan (21-6-2) to an exclusive contract to fight "under my banner" . . . Kentucky and U.S. Agriculture officials are sighing relievedly, with fingers crossed, over the diminution of the fearsome contagious equine metritis. The state veterinarian's office reports the list of 412 mares and 11 stallions suspected of infection or exposure has been reduced to 84 mares, two stallions on the quarantine list, and incidence of the V.D. confined to two farms, Spendthrift and Gainesway . . .