Charlie Woods, the 15-year-old son of Tiger Woods, has shot a 12-over par round of 82 at the US Junior Amateur at Oakland Hills.
Woods birdied both of the par fives on the North Course on Monday but struggled on the par threes and fours, carding five double bogeys and four bogeys.
Woods will require quite a turnaround on the South Course on Tuesday - which Ben Hogan called "The Monster" - to be among the low 64 scorers from a field that started with 264 players from 40 US states and 35 countries.
At an event that usually draws just a few hundred people for the championship match, around 100 people were waiting on the first tee to see Woods play and at least that many spectators followed him throughout his round.
But Charlie was visibly frustrated with his performance and his famous 15-time major winning father was relatively helpless as rules prevent parents from coaching their children during the tournament.
Charlie earned a spot in the field last month with a one-under 71 as the medallist from his qualifier at Eagle Trace Golf Club in Coral Springs, Florida.
Tiger was 14 when he qualified for his first US Junior and reached the semifinals. He won his first US Junior a year later and went on to become the only player to win the tournament three times in a row.
He had travelled to Detroit from Scotland after matching his highest 36-hole score as a professional at the British Open, missing the cut for the third straight time in a major.
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