Gary Lavelle, the left-handed reliever traded to the Toronto Blue Jays for right-hander Jim Gott and two minor-leaguers, could have vetoed the trade because of his status as a 10-year major-leaguer with five on the Giants. That's what he did when the Giants tried to send him to the Detroit Tigers during the winter meetings.

Lavelle didn't want to be No. 2 in the Detroit bullpen behind Willie Hernandez; now he is "really looking forward to playing in Toronto . . . I think the addition of Bill (Caudill) and me will really help the Jays. I'll be the No. 1 guy from the left side and he'll be the No. 1 guy from the right side."

Pat Gillick, Blue Jays executive: "I think this is the last chip that puts us in a position to take it all" . . .

Gordon Campbell, a Giants' physician who has been overseeing Jack Clark's rehabilitation from knee surgery, said he doesn't expect today's crucial physical examination to abort the swap of the two-time all-star outfielder from San Francisco to St. Louis for David Green, Dave LaPoint, Gary Rajsich and Jose Gonzalez . . .

WGN in Chicago (Cubs) is expected to follow other superstations in making annual payments to teams for telecasting games into their areas. Atlanta's WTBS (Braves) agreed last week to a five-year deal which could bring each club as much as $230,000 annually. Then, WPIX and the New York Yankees settled with Commissioner Peter Ueberroth on a deal "similar" to the Braves'.