Early PGA Tour Results
McLachlin's first PGA Tour event was the 2000 Sony Open in Hawaii, where he failed to make the cut at the tournament's midway point. He qualified for his first major championship in 2004, playing the U.S. Open, but missed the cut. He played several PGA Tour events in 2006 on a sponsor's exemption. He finished 59th in the Sony Open and 38th in the AT&T Pebble Beach National Pro-Am later in the year.
Nationwide Tour Results
In 2006, McLachlin made the cut in 16 of the 28 tournaments he played on the Nationwide Tour and posted five top-10 finishes. This earned him $176,881 and a number 29 ranking on the money list at the end of the season. One of his best results of 2006 came in the first tournament of the year, where he placed second in the Movistar Panama Championship.
Having earned his PGA Tour card with a 16th-place finish in the 2006 Qualifying School tournament, McLachlin went on to make the cut in 13 of 28 Tour events in 2007. His best result was a fifth-place finish in the Turning Stone Resort Championship.
In 2008, McLachlin posted four top-10 results and scored his first PGA Tour win at the Legends Reno-Tahoe Open. He shot a 62 in the second round to tie the course record. Winning this tournament qualified him for the PGA Championship, but he missed the cut at the halfway point. He also posted a 10th-place finish in the Sony Open, which was held in McLachlin's home state of Hawaii.
Through July, McLachlin's highest finish on the PGA Tour for the 2009 season was 17th in the FBR Open, which paid $87,000. He hit another significant payday in the season-opening Mercedes Benz Championship, finishing 24th and earning $64,000. Overall, his 2009 season has been inconsistent, with only seven cuts made out of 19 PGA Tour starts.