A foreigner that competed in the Masters? That is a bit broad.
All foreign winners are still kicking, I believe

Gary Player
Sand Lyle
Mike Weir
Bernhard Langer
Jose Maria Ilostmyball
Seve Ballesteroids
Ian Woosnam

Closing In
 

You're close with #3 on your list

Could it be?
 

George Knudson?

UPP in snowy Ohio

Right Track
 

No...but this clue should do it....he is a Canadian who competed in the Masters but did not finish playing all four rounds.

The Schmo!
 

Moe Norman

Yes sir Mr. Okie...only one of two players who owned his swing....he got up every morning knowing that he could hit the ball precisely how and where he wanted to....there is a story that he and some famous player were playing some hole that had water running across it. The famous player pulls out a lay up club and positions it nicely short of the water. Moe pulls out his driver and the dude tells him he surely will put it in the water. Moe says ...no sir...I am going to hit that walkway crossing over the water...should be no problem.