In October at the Bank of America Monterey Peninsula Classic he won with a final round of 74 for his first Nationwide Tour victory.

In 2003 Thatcher had four top-10finishes on the Nationwide Tour including a tie for 2nd at the Price Cutter Charity Championship where he earned $48,200.

At the Reno-Tahoe Open at Montreaux Golf Club he shot 66-68-68 in the first three rounds to hold the third-round lead.

At the Bell Canadian Open at Glen Abbey Golf Course in Oakville, Ontario, he finished tied for 26th but had one of the best final rounds.

Because of his rough start, Thatcher finished out of the top-125 on the PGA Tour money list and therefore had to go back to Q-School.

In 2005 Thatcher finished tied for 8th at the FedEx St. Jude Classic where he fired a final round 69 and took home the largest paycheck of his career at $142,100.

At the Buick Open in Grand Blanc, Michigan one of his best moments was being the closest to the pin in the final round at the infamous par-3 17th which is surrounded by some of the rowdiest fans on Tour.

Things looked good for Thatcher at this point as he was leading the Tour in the important stat of "Greens in Regulation".

Things then improved tremendously as he had five top-25 finishes in a row, including a playoff loss to Nick Flanagan at the Henrico County Open where he earned $33,600.

Thatcher finished in 2nd place on the final 2007 Money List, earning his PGA Tour card for 2008.

In February at the Mayakoba Golf Classic at Riviera Maya-Cancun in Mexico, he shot a career best 61 in the third round.

In April he finished T-7 at the EDS Byron Nelson Championship earning $179,733, the largest payday of his career.