Lowry made his professional debut in the 2009–10 UEFA Europa League in an away fixture at Rapid Vienna. On 17 September 2009, Lowry signed a three-month loan deal with Football League Championship side Plymouth Argyle. Lowry made his Plymouth Argyle debut on 19 September 2009, playing 90 minutes, in a 3–1 loss against Newcastle United. He played 13 league games for Plymouth during his loan spell, where he impressed many and was recalled by Villa who required Lowry's services as cover after some injuries to defenders.
In September, he signed a clothing deal with Puma. In the same month, he was also chosen as a captain's pick for the U.S. Ryder Cup team. At age 21 years and 9 months when the matches began, Fowler became the youngest U.S. Ryder Cup player of all time, and only European Sergio García was younger when he made his Ryder Cup debut in 1999. Fowler forfeited a hole during foursomes competition on the first match day because of a rules violation, by taking a permissible free drop from muddy conditions in an improper location, a mistake U.S. captain Corey Pavin attributed to Fowler's inexperience. On the final day of the competition in his singles match against Edoardo Molinari, Fowler birdied the last 4 holes to halve the match after having been 4 down after 12 holes.
Frys.com Open: At the Frys.com Open in Scottsdale, Ariz., reached a three-way playoff with Jamie Lovemark and eventual-winner Troy Matteson. Began the final round four strokes behind Matteson, but played his first five holes in 5-under, punctuated by a hole-in-one from 211 yards at the par-3 fifth hole. After finishing T2 in the playoff, he had recorded all eight of his professional rounds in the 60s. Thanks to the T7 in Las Vegas at the Justin Timberlake Shriners Hospitals for Children Open and T2 finish at Grayhawk GC, he surpassed No. 150 from the 2008 money list, earning special temporary membership on TOUR for the remainder of the season.
Hero World Challenge: After beginning the final round seven strokes out of the lead, closed with a tournament-record, personal-best 11-under 61 to win the Hero World Challenge by four strokes over Charley Hoffman. With a winning score of 18-under 270, won at the age of 28 years, 11 months and 20 days. His 61 topped the previous Hero World Challenge course record of 62, set by Albany resident Justin Rose during the final round in 2015. Prior to his 61, the previous low final-round score by a Hero World Challenge winner was 64, set on three occasions and most recently by Luke Donald in 2005. Opened his final round with seven birdies before making his first par on the par-4 eighth hole. No player has had as long a streak of birdies in an official PGA TOUR event to open a round since Joe Durant started round four of the 2005 Honda Classic with seven in a row. Added a birdie on the ninth hole to make the turn with an 8-under 28, turning a seven-stroke deficit into a two-stroke lead. His final round included 11 birdies, two more than his benchmark of nine birdies in official PGA TOUR events (final round of the Quicken Loans National in 2017). Finished the week at Albany Golf Club with 30 birdies, three more than his highest total in official PGA TOUR events (27 – 2017 Houston Open). Recorded his sixth top-six finish at the event in his sixth start (1/2017, T3/2016, 3/2015, T6/2014, T4/2012, T6/2011).
Born in Modesto, California, to John Howard Aldrich DeChambeau and Janet Louise Druffel, DeChambeau moved to Clovis, east of Fresno, at age seven. He attended Clovis East High School and won the California State Junior Championship at age 16 in 2010. DeChambeau graduated in 2012 and accepted a scholarship to Southern Methodist University in Dallas, Texas, majoring in physics.