Country: United States
Lewis was a decorated amateur and a four-time All-American at the University of Arkansas. Suffering from scoliosis which was diagnosed at age 11 and treated by a spinal fusion when she was in high school, Lewis missed her first collegiate golf season recovering from the surgery. Playing her first season in 2005, she won the Southeastern Conference Tournament and was named SEC Freshman Golfer of the Year.
In her 2007 season, though a back injury kept her out of the SEC Tournament, Lewis won the NCAA Championship and was selected Golf Digest Amateur of the Year. She also received the National Golf Coaches Association Dinah Shore Trophy. Following the college season, she won the 92nd Women's Southern Amateur and finished second in individual play in leading the US team to a victory at the Copa de las Americas.
Competing as an amateur, Lewis finished first in the 2007 P&G Beauty NW Arkansas Championship, a professional LPGA tournament. Due to rain, the tournament was shortened to one round and Lewis's win was declared unofficial.
In her senior season in 2008, Lewis again won the SEC Tournament and was selected SEC Golfer of the Year and SEC Golf Scholar Athlete of the Year. She was named to the ESPN the Magazine Academic All-America team for the second time and NGCA All-America for the fourth time.
Lewis graduated from the University of Arkansas in 2008 with a degree in Finance and Accounting.
In 2008, as a member of the winning US Curtis Cup team, Lewis became the first player ever to go 5–0 in a single Curtis Cup match.
 Professional career
Lewis turned pro in June 2008 prior to competing in sectional qualifying for the U.S. Women's Open. She won medalist honors in the Garland, Texas, sectional on June 9, 2008. The U.S. Women's Open, three weeks later, was her first tournament as a professional. She led the field after three rounds and went on to finish tied for third, five strokes behind winner Inbee Park.
Lewis competed in seven events on the LPGA tour in 2008 and earned two top-10 finishes, including the third place finish in the U.S. Women's Open.
Before 2009, Lewis was not a member of the LPGA Tour or any other professional golf tour. She was eligible to play in the U.S. Women's Open after successfully competing in the sanctioned qualifying process. She then tried to earn her LPGA Tour card in 2008 through the use of sponsor's exemptions, but was not successful. As a result she went to LPGA Qualifying School in December 2008, an event which garnered considerably more press coverage than normal due to the presence of Michelle Wie. Lewis finished as top scorer for the five-round event, three shots ahead of the field and six in front of Wie who finished in a tie for 7th place.
Lewis's endorsement deals include Mizuno golf clubs and Fila apparel.