The Seattle Mariners enjoy first pick in today's draft, with Hal Keller, director of player personnel, saying he wishes there was a top-grade college shortstop available but unless a super one magically materializes in the wee hours, the Kingdomers more likely will go for Tim Leary, UCLA right-hander coming off a 12-3 junior year. Whoever, it's not likely Seattle's leadoff choice would break in before our eyes way down at the Alexandria Class A level - more probable he'd start on high a 1a Horner. . . .

Seattle? Received by The Washington Post sports department yesterday, in a plain brown wrapper, no return address: a green and gold box of Kleenex. Post-marked May 23, Moses Lake Wash. The Bullets led the NBA finals 1-0, on that date but, evidently, some Sonic supporter suspected who'd need the crying towels in the end and didn't mind spending $1.05 postage to rub it in . . .

Killjoys? How about the Toronto correspondent of the Sporting News who says hold the phone with the "first" on Alexandria Mariner Gary Pellant's Hall of Fame feat of switch-hitting home runs in an inning - it was done in the international League May 3, 1961, by Ellis Burton, Toronto, eight inning versus Jersey City: a two-run homer batting left-handed, then a grand slam right-handed!

In mentioning hitters of two home runs in an inning, without switching, reader E. Wayne Mather Jr., of New Carrollton (and Post sports photographer Dick Darcey) say of our article on Pellant's accomplishment, we should have singled out Jim Lemon of the old Griffith Stadium Senators, whom they saw knock in six runs with his pair in the third inning Sept. 5, 1959 . . .

Lou Brock not only was left off the AllStar ballot but is the NL player of the month for batting 433 in May. Not to worry, says Dodger Manager Lasorda, who will direct the Nationals in the game July 17 at - here we go again - the Kingdome: if Brock doesn't make it as a write-in starter, Lasorda will tap the rejuvenated oll Card as his first sub on the roster.