Mickelson, who was the Claret Jug winner in 2013, struggled to get started on Thursday. He was out of contention to not only win the Claret Jug in 2013, but also to make it to the final round.
Lefty started out fine. He won the first hole and then won the second. It was then all downhill.
Mickelson bogeyed Mickelson's par-3 third hole. Mickelson followed that up with a par-4 fourth. Another bogey was made on the par-4 fifth. In just three holes, he was at 3-over par.
With a par on the sixth, he would bring things back to track. He then made a bogey at the par-5 7th hole to drop to 4-over par.
Mickelson would play the par-4 8th hole, before closing his front nine by making a par at the par-4 9th. On the front nine, he shot a 5-over par forty.
As he turned, Lefty seemed to calm things down.
To remain at 5-over par, he opened his second nine by scoring pars on the 10th hole, 11th and 13th holes. To drop to 6-over-par, he bogeyed his par-4 13th hole.
Mickelson fell again after a par at 14th. After bogeying the par-4 15th, Mickelson slipped up again. He then bogeyed his par-3 16th. He ended up with 7-over for his round.
Lefty managed to par the 17th, but he bogeyed the 18th while on his way in. He ended the round with a double-bogey and an 80. He was the last player in the 156-player field when he finished.
Mickelson had a terrible Open Championship round. He hopes to soon forget that day.