Three newcomers among the Boilermakers' seven-man contingent for season opener.
Duncan named a Cleveland Golf/Srixon All-America Scholar.
Duncan will lead Boilermaker lineup in No. 1 position as Purdue looks for 13th Big Ten title.
In 2005, Robertson was honored with the prestigious Jan Strickland Assistant Coach of the Year Award, presented annually by the Golf Coaches Association of America (GCAA).
During his tenure at Purdue, Robertson has served as a mentor to numerous student-athletes, including former Boilermaker Pariya Junhasavasdikul, who has earned more than $440,000 on the Asian Tour.
Robertson walked all 54 holes with Junhasavasdikul at the 2007 Western Intercollegiate, when the latter set a Purdue 54-hole record with a total of 200 (-10), and the final round of the 2007 Big Ten Championships, which Junhasavasdikul won by eight strokes.
Under Robertson's guidance, Junhasavasdikul won the 2007 Les Bolstad Award as the Big Ten golfer with the lowest season scoring average.
"I am what I am today because of the experience I had as a member of the Purdue golf program," Junhasavasdikul, who won the 2010 Mercuries Taiwan Masters, said. "I became more responsible both on and off the golf course. Coach Brouse and Coach Robertson worked with me on every aspect of the game, from swing technique and mental strength to course management and physical fitness. Walking down the last hole of the Big Ten Championships with Coach Robertson is a memory I will remember for the rest of my life."
In addition to his duties with the Boilermakers, Robertson is also a renowned caddy who has carried the bag on some of the sport's biggest stages.
Robertson caddied for his sister, Jo Jo, at the 1998 U.S. Women's Open, where she tied for 59th as an amateur, and has also walked with former Oklahoma State teammate and current PGA Tour player Chris Tidland.
Robertson's most extensive caddying has come on the bag of former Boilermaker star Maria Hernandez, having worked with her on four occasions over the last two years. Robertson caddied for Hernandez during the final stage of LPGA Q-School in 2009, as well as the U.S. Women's Open in both 2009 and 2010, and the 2010 LPGA Tour Championship.
"Greg is the best caddy I've ever had," Hernandez said. "He is always helpful and supportive, and he does an incredible job of bringing knowledge of the courses we play on. More than anything, it just gave me confidence to have him on the bag. He's as a great a coach as he is a caddy, and any player who has the opportunity to work with him will definitely grow as a player."
Robertson played collegiate golf at Oklahoma State, where he helped the Cowboys capture the 1995 NCAA championship. The Roswell, N.M., native redshirted his first year in Stillwater, and graduated from OSU with a degree in sports science in 1997.
With one year of eligibility remaining, Robertson transferred to New Mexico, where he competed as a senior and began work on a Master's degree in sport administration.
From 1998-2000, Robertson competed in the professional ranks. In 2000, he played on the Canadian Tour and competed in the PGA Tour's Nissan Open.
In 2001, Robertson participated in several state tournaments before returning to Stillwater to kick off his coaching career as a volunteer assistant at Oklahoma State.
Robertson and his wife, Ashlee, reside in West Lafayette with their sons, Michael and Tyler.