Mike Grove, who last year lost and regained his PGA Tour playing rights, scored two career "firsts" yesterday with a seven-under-par 65 and a tie with Ed Fiori for the lead after one round in the $300,000 Doral-Eastern Open.

Both played the 7,065-yard Blue Monster course at Doral Country Club without a bogey.

It was Gove's lowest round in four years on tour and the first time he has led or shared the lead. To get it, he had to one-putt 11 times and pitch in once.

Lanny Wadkins shot 66 and the three-time winner last season, who finished second in the first two events this year, said, "If I'd putted like this, I'd have won the first two in a cakewalk."

Ken Green, who had the best tournament of his brief career last month in the Bing Crosby, dropped five putts from the 25-foot range--two for par--en route to 67. Tom Kite, a winner and a runner-up in his last two starts, was at 68 with Jim Booros and Peter Oosterhuis . . .

Gay Brewer shot four-under 68 in Indian Wells, Calif., for a one-shot lead over Gardner Dickinson after one round of the $300,000 Vintage Invitational for seniors. Two back were defending champion Miller Barber, Bill Collins and Paul Harney.