The scorecard was a sad read.
He counted +10 and landed on 80 strokes.
This after eight bogeys and a final double bogey when he ended up in the ruff this painful day.
The cut is currently on 71 strokes and it is already clear that Mickelson will not play over the weekend.
He won the competition in 2013 and came second in 2016 after a fantastic duel with Henrik Stenson who is part of Swedish sports history.
Lost the form after the major victory
After the major win in May, Mickelson has not been among the top 60 in his four subsequent competitions.
Today's 80 strokes is Mickelson's worst start to The Open in his 27 starts.
At 10.47 Swedish time, Mickelson knocks out the second round together with Tyrrel Hatton and Kevin Kisner.