Seattle Slew is ready to run - "he's fit to run two miles now," says part-owner Mickey Taylor - and it's back to the races, at Aqueduct, inside of two weeks of the $12 million Triple Crown wearer.

Hors de combat since his lone loss July 3, Slew has been working daily under his new trainer, Doug Peterson, and is timetabled for an allowance race in Early May as a prep for his first stakes start. That will come at the other New York City area track, Belmont, on May 29: the $100,000-added Metropolitan Handicap.

Joe Thomas continues to reshape his San Fran 49ers. Goodbye, 1976 all-pro defensive end Tommy Hart after slipping from 16 sacks to only three in 1977 - Thomas gave up that 10-year Niner to Chicago yesterday for the Bear's second-ruound draft turn. While Hart and played-out St. Louis card monster Walt Patulski try to Bear up the lakefront defensive front vacated by traded-to-Tampa 1976 all-pro Wally Chambers, the 49ers, says Thomas, will switch Cleveland Elam, who developed into their best last season, from tackle to end and play Ed Galigher at tackle.

Marv Matuszak, of George Allen's 1977 Reuskin staff, is out to tack $29,000 onto Washington's price for having replaced Allen with Bear croaching evacuee Jack Pardee. Matuszak sued in Fairfax County Circuit Court this week, saying his contract required the Skins to notify him in writing by Feb. 1 if they weren't going to renew. Matuszak, now settled in Atlanta, says be got no such notice, no spot on Pardee's staff and no 1978 pay. Larry Lucchino, Redskin attorney, says hokum, Matsuzak knew his status and the club will "vigorously defend this"

This one is some spring sports weekend for Maryland: At Clemson today and tomorrow. Coach Frank Costello's track-and-fieldsters are rated shoo-ins to win a 24th Maryland title in the 25th conference outdoor meet . . . At Byrd Stadium tomorrow, annual Red-White intrasquad football at 11 a.m., followed at 2:30 by lacrosse's national game of the week: Maryland, 6-0 and ACC title clinched, vs. Navy, 7-0 . . . Plus,9 a.m. and 1:30 p.m. Sunday, U. of M's sixth annual womens track invitational, 35-40 schools expected to have entrants . . .

Angel outfielder Lyman Bostock, after boosting his B.A. from .051 to .114 with a three-hit night at Seattle: "The offer (to refuse April paycheck stands . . . It's still a long haul."