Laffit Pincay Jr. brought Kentucky Derby winner Sunny's Halo out of the pack yesterday to win Louisiana Downs' $500,000 Super Derby by 10 lengths, setting back Play Fellow's chances of earning this year's Eclipse Award for best 3-year-old. Play Fellow, with Pat Day up, finished second and My Habitony was third. The winner got $300,000.

Play Fellow and Slew o'Gold have been considered the leaders in their division. But David Cross Jr., Sunny's Halo's trainer, said his horse still has a good shot at it and that it will force him to run the colt in The Jockey Club Gold Cup at Belmont Park, Oct. 15.

Desert Wine finished fourth, a nose ahead of Explosive Wagon in the field of six.

The 7-to-2 favorite, Sunny's Halo, and Play Fellow, who went off at 6-5, had met in three previous races, with Play Fellow finishing ahead twice but running sixth in the Kentucky Derby. Cross said he never lost faith in Sunny's Halo. "I don't know how people could put the horse down," he said. "You win some when you shouldn't and you lose some when you shouldn't." . . .

At Laurel, Bemissed, the only filly among the nine 3-year-olds in the $56,400 Japan Racing Association Handicap, held off the late rally of Dogwood Stables' Domynsky to win by a neck under Miguel Rivera. Native Raid tired to third, three lengths back.

Bemissed is a daughter of Nijinsky II and had been winless in 11 starts this year. She was treated with the diuretic Lasix for the first time before this race. She was timed in 1:42 3/5 for the mile and 1/16th and paid $15 . . .

At Belmont Park in New York, First Approach defeated If Winter Comes by three lengths in the $113,600 Flower Bowl Handicap.