Porteous won the 2013 Amateur Championship where he defeated Toni Hakula, 6 &amp; 5. This win earned him entry into the 2013 Open Championship, 2014 Masters Tournament, and the 2014 U.S. Open provided he maintained his amateur status. He also won the 2013 Scottish Amateur Stroke Play Championship and was runner-up in the 2013 Welsh Strokeplay Championship