Coach Don Shula says he has "tried to give Bob the benefit of the doubt." But in the wake of Bob Griese's second straight subpar performance, Shula will give Don Strock a long look as possible Miami Dolphin quarterback starter in place of Griese, a 13-year veteran coming off the two finest statistical seasons of hig NFL career.

Shula said he isn't sure whether Griese's problems are the result of age (34) or a bothersome hamstring, but, "We're so disappointed with the offense . . .

"In analyzing Bob's performance in the Jets game (two weeks ago), he had five or six poor throws, which is very uncharacteristic of Bob." And in Monday night's 13-3 loss at Oakland, Griese was sacked six times and intercepted for a TD on what Shula termed "a poor throw in a poor place."

Strock led Miami to a 27-12 early-season victory over Minnesota after an injured Griese left a 12-7 deficit, but the sixth-year pro from Virginnia Tech has been sidelined, himself, with an ankle injury . . .

Knowing Tom Landry & Co., figure the Cowboys to have their cake and eat it, too, finagling some other club out of a 1980 no. 1 draft pick, well ahead of Dallas' own first-round draft slot . . . Now that it's been dealt off to Baltimore for John Dutton . . .