|Full name||Lonnie Dean Nielsen|
|Born||June 29, 1953|
Belle Plaine, Iowa
|Height||5 ft 11 in (1.80 m)|
|Weight||200 lb (91 kg; 14 st)|
|Residence||Palm Beach Gardens, Florida|
Orchard Park, New York
|Spouse||Mary Jo (1977-present)|
|Children||Sarah, Mollie, Andrew|
|College||University of Iowa|
|Current tour(s)||Champions Tour|
|Former tour(s)||PGA Tour|
|Number of wins by tour|
|PGA Tour Champions||2|
|Best results in major championships|
|PGA Championship||T11: 1986|
|U.S. Open||CUT: 1977, 1983|
|The Open Championship||DNP|
Nielsen was born and raised in Belle Plaine, Iowa. His father started him in golf as a youngster on the sand green courses in and around his hometown. He attended the University of Iowa, where earned a Bachelor of Business Administration degree in 1976.
Nielsen became a member of the Champions Tour upon reaching the age of 50 in the summer of 2003. He won his first Champions Tour event at the Commerce Bank Championship in 2007. His second Champions Tour win came in 2009 at the Dick's Sporting Goods Open, where he came from three strokes behind Fred Funk in the final round with a 9 under par 63 to win by three strokes.
In 2009, Nielsen became the first tour professional to serve as a lead contributor to the GIVE (Golf For Injured Veterans Everywhere) Foundation.
Nielsen was inducted into the Iowa Golf Hall of Fame in 2010.
|No.||Date||Tournament||Winning score||Margin of victory||Runner(s)-up|
|1||Jul 1, 2007||Commerce Bank Championship||-14 (66-64-69=199)||2 strokes||Loren Roberts|
|2||Jun 28, 2009||Dick's Sporting Goods Open||-21 (66-66-63=195)||3 strokes||Ronnie Black, Fred Funk|
Champions Tour playoff record (0-1)
|1||2006||JELD-WEN Tradition||Eduardo Romero||Lost to birdie on first extra hole|