A lot of preparation went into catching Mark McGwire's 63rd home run ball, and the fan who has it is considering cashing in.

"The ball is worth something to someone, and I'd like to have something for it myself," said John Grass, 46, of St. Louis. "Whatever happens, I got what I wanted."Grass is the first fan since McGwire hit his 55th who has not surrendered the ball. McGwire didn't appear concerned about it.

"That's all right," he said. "He can keep it."