Rory Mcllory’s Masters education continued with a one over par 73 on Friday.
Four under on the 16th tee, a brilliant round of golf was undone by two disastrous holes at the 16th and 18th.
A double bogey on 16 and a triple bogey on 18 meant the 19-year-old dropped five shots in the last three holes to go one over par for the tournament.
The day had started well for Mcllroy. Two pars to start off with were followed by birdies at three and four to put him up to two under par.
The teenager dropped a shot at the par 4 seventh hole but rebounded brilliantly to score a birdie at the par 5 eighth.
Mcllroy rattled off four consecutive pars and got through Amen Corner in regulation, before eagling the par 5 13th to jump up to four-under-par.
A bogey on the 14th saw the County Down native go back to three-under-par, but Mcllroy got the shot back with a birdie on the par 5 15th.
However, the par 3 16th hole stung Mcllory as he left the hole with a double bogey five to take him back to two-under-par.
A par on 17 was followed by a triple bogey on the last to destroy the round and leave Mcllroy at one over for the tournament, on the projected cut score.
Mcllroy was playing with American Anthony Kim, who was on fire, shooting a Masters record of eleven birdies in one round for a 65 to go four-under-par for the tournament.
Chad Campbell and Kenny Perry co-lead the tournament in the clubhouse at nine-under-par.
Tiger Woods shot a level par 72 to leave him two-under-par for the tournament.