Graeme McDowell has failed to make the final round of the Canadian Open after struggling to a four-over-par 76.
The Portrush player finished one over in the third round and misses the last round under the PGA Tour's MDF (made cut, did not finish) rule.
It is enforced as a Saturday cull after over 70 players make the halfway cut, to keep the field at a more manageable size for the final round.
McDowell was one of four players to suffer a third-round exit.
The former US Open champion shot a sparkling 65 on Friday but a miserable third round included six bogeys to go with two birdies.
"Another strange day at the office," McDowell wrote on Twitter.
"Didn't drive it great and putted awful. Been working so hard on my long game lately putting has suffered."
McDowell was 15 shots behind leader Brandt Snedeker.