Day turned professional in July 2006 after winning the Green Jacket at the NEC Master of the Amateurs, signing with TaylorMade and Adidas and immediately began playing PGA Tour events, principally through sponsors' exemptions. He made the cut in five of his first six PGA Tour events as a pro with a best finish of eleventh at the Reno-Tahoe Open and with official winnings of over $160,000. He entered PGA Tour qualifying, or Q-School. Placed in the second of three rounds, he tied for first in his section of the second round, advancing to the Q-School finals. However, in the six-round finals he played poorly, shooting fifteen shots higher than the score needed to qualify. Accordingly, he failed to earn his 2007 PGA Tour card but earned conditional status on the Nationwide Tour for 2007.