'It means a lot, it's cool,'' Haas said. 'It's beating 300 people and I think that's pretty neat. But nobody is going to say, `Who was the medalist of stroke play?'''
The field of 312 will not be cut to 64 until Wednesday morning because 17 players were at the cut of 3-over and after two playoff holes, there were four players still competing for two spots when darkness stopped play.
Following the cut, the match-play portion of the tournament will begin. There will be one round of match play each day, with two rounds Thursday, leading up to Sunday's 36-hole final when the 102nd champion joins the likes of Tiger Woods, Phil Mickelson, Jack Nicklaus, Arnold Palmer and Bobby Jones.
Two shots behind Haas, of Greer, S.C., were Dustin Bray of Asheboro, N.C., Anthony Kim of La Quinta, Calif., David Miller of Daphne, Ala., Ricky Barnes of Stockton, Calif and John Merrick of Long Beach, Calif.
Kevin Stadler of Englewood, Colo., son of PGA Tour pro Craig Stadler, Joe Affrunti of Crystal Lake, Ill., and J.J. Jakovac of Napa, Calif were at 2 under.
Just 14 golfers were under par after two days on Oakland Hills' two courses.
Joseph Bramlett, 14, the youngest player to compete in the U.S. Amateur, missed the cut at 19-over 159. The Saratoga, Calif., native was not satisfied with just qualifying from the 7,597 entrants.
'I was trying to win,'' Bramlett said. 'My goal for every tournament is to win.''
While Haas caddied for his father earlier this month in at the Buick Open, he is carrying his own bag at the U.S. Amateur.
Haas, who also carries his own bag at Wake Forest, said he will be without a caddie unless he finds somebody to do it for free.
'I don't really want to pay anybody to do it,'' he said with a smile.
'I have no problem carrying my own bag, unless in the finals that would look bad on TV.''
When asked why his dad couldn't make the trip to Michigan to caddie for a couple days before playing in the Reno-Tahoe Open this week, he joked: 'He needs the rest. He's getting old.''
Jay Haas started playing the tour full time in 1977 and has won nine tournaments and over $9 million.
All jokes aside, Bill Haas said he's proud to be Jay Haas' son.
'When I was growing up it was cool to see him on TV,'' the 20-year-old said. 'Now I know what he does and I want to do it. He's my mentor, he's the guy I look up to, the whole reason I play the game of golf.
'It's nice to have a dad on the PGA Tour, but it would be no different if he wasn't.''
Bill Haas said he talked to his father on Monday night and planned to do so again Tuesday, but will not ask for tips or expect to receive them.
'He tries not to give me too much advice because he's not here,'' Haas said.
The U.S. Amateur winner will get his name on the Havemeyer Trophy and if he remains an amateur, he gets an automatic berth into the next U.S. Open and traditionally has been invited to play in the following Masters.