SHEBOYGAN, Wis. — Tiger Woods is lonely these days on the golf course.
He's feeling a bit old, too — and not just because of the cranky, arthritic knee, a surgically repaired back, a variety of aches and pains, and a receding hairline.
He's feeling old at 39 and isolated, because everywhere he looks he sees kids.
A wave of youngsters has energized professional golf, starting with the game's top-ranked players: No. 1 Rory McIlroy, the big kid on the block at 26 with four major titles; and No. 2 Jordan Spieth, 22, from Texas who won the Masters and U.