Plenty of athletes throw tantrums, demand attention and act like children, but at least Jack Patrick Lindsay III has an excuse for when he misbehaves—he's 3.

Stick a golf club in his hands, though, and the little guy puts full-grown hackers to shame. A 3'1" prodigy from Holtsville, N.Y., Jack has a textbook swing that can launch balls 70 yards on target. He also has an agent, a Web site and the nickname Tiger Cub, a reference to you know who. "When he plays, there's this light in his eyes," says his mother, Kim, 38. "Golf thrills him."

As an infant, Jack was mesmerized by the Golf Channel; at 13 months, he was expertly mimicking a swing with plastic clubs. "I'm lying on the sofa and Wiffle balls are hitting me on the head," says his dad, Jack II, 43, a casual golfer who, with his wife, runs a medical sales company out of their four-bedroom house. Too young to play on courses, Jack is always begging to go to a nearby range and often cries when it's time to go home. "His eye-hand coordination is great," says top instructor Michael Hebron, who recently gave Jack his first lesson. "He hit the first putt he tried for me, from 15 feet."

Still, while Jack's poised appearance on Live! with Regis & Kathie Lee in February echoes a tiny Tiger Woods's 1978 turn on The Mike Douglas Show, the Lindsays—who also have two daughters, Jamie, 16 and Kaley, 7—want their son to spend as much time in sandboxes as sand bunkers. "Who knows?" says Jack II. "Next year he might say, 'Dad, I want to dance.' "