| Rank | Event | Year | Location | Result |
| Olympic Games | ||||
| 1 | 100m Butterfly | 2000 | Sydney, NSW, AUS | 52.00 |
| 2 | 4 x 200m Freestyle Relay | 1996 | Atlanta, GA, USA | 7:17.56 |
| 2 | 4 x 200m Freestyle Relay | 1992 | Barcelona, ESP | 7:15.51 |
| 5 | 4 x 100m Freestyle Relay | 2008 | Beijing, CHN | 3:11.92 |
| 6 | 100m Freestyle | 2000 | Sydney, NSW, AUS | 49.22 |
| 6 | 4 x 100m Freestyle Relay | 2000 | Sydney, NSW, AUS | 3:19.60 |
| 7 | 4 x 100m Freestyle Relay | 1996 | Atlanta, GA, USA | 3:20.16 |
| Heats | 100m Butterfly | 2008 | Beijing, CHN | 52.15 |
| Heats | 4 x 100m Medley Relay | 2008 | Beijing, CHN | 3:35.83 |
| Heats | 4 x 100m Freestyle Relay | 2004 | Athens, GRE | DSQ |
| Heats | 50m Freestyle | 2000 | Sydney, NSW, AUS | DNS |
| Heats | 100m Freestyle | 1996 | Atlanta, GA, USA | 49.91 |
| Heats | 100m Butterfly | 1996 | Atlanta, GA, USA | 54.37 |
| World Championships | ||||
| 1 | 100m Butterfly | 2001 | Fukuoka, JPN | 52.10 |
| 1 | 4 x 200m Freestyle Relay | 1994 | Rome, ITA | 7:17.74 |
| 2 | 50m Butterfly | 2001 | Fukuoka, JPN | 23.57 |
| 2 | 100m Butterfly | 1998 | Perth, WA, AUS | 52.79 |
| 2 | 100m Butterfly | 1994 | Rome, ITA | 53.65 |
| 3 | 100m Freestyle | 2001 | Fukuoka, JPN | 48.79 |
| 3 | 100m Freestyle | 1998 | Perth, WA, AUS | 49.53 |
| Semifinal | 100m Butterfly | 2011 | Shanghai, CHN | 52.34 |
| Heats | 4 x 100m Freestyle Relay | 2011 | Shanghai, CHN | 3:17.07 |
| Heats | 4 x 100m Medley Relay | 2011 | Shanghai, CHN | 3:38.34 |
| Heats | 100m Butterfly | 2009 | Rome, ITA | 52.27 |
| Heats | 4 x 100m Freestyle Relay | 2009 | Rome, ITA | 3:13.38 |
| European Championships | ||||
| 3 | 4 x 100m Freestyle Relay | 2010 | Budapest, HUN | 3:15.07 |
| 4 | 100m Butterfly | 2010 | Budapest, HUN | 52.24 |
| 6 | 4 x 100m Freestyle Relay | 2012 | Debrecen, HUN | 3:17.12 |
| World Championships Short Course | ||||
| 8 | 4 x 100m Freestyle Relay | 2010 | Dubai, UAE | 3:11.29 |
Nickname
Lasse. (NOC, 14 May 2004)
Education
Management Information Systems - Southern Methodist University, Dallas, TX, USA
Language(s) spoken
Swedish, English
Club name
Linkoping ASS, Linkoping, SWE
Coach
Michael Holmertz [club] (iof3.idrottonline.se, 21 Apr 2012)
Position and style
Butterfly (svd.se, 18 Jun 2012)
Handedness
Right (NOC, 14 May 2004)
Debut
1991 for Sweden, European Championships (Greece) (NOC, 14 May 2004)
Injuries
After the 1996 Olympic Games in Atlanta, he began to experience headaches, was sleeping 14 hours a day and started to lose weight. He was eventually diagnosed with a sensory integration problem. Due to clouding of his eye fluid, images and light appeared distorted and he was prescribed Selenium to alleviate the clouding and was given glasses equipped with lights to stimulate his photo receptors. The combination helped almost immediately and at the 1997 European Championships in Seville, Spain, he won the 100m butterfly title. (NBC Olympics, 29 Jun 2001)
Additional information
Start of sporting career
He took up swimming at age 10 in Sweden. (Swedish Olympic Team Handbook, 21 May 2001)
Most memorable sporting achievement
Winning gold in the 100m butterfly at the 2000 Olympic Games in Sydney. (simforbundet.se, 13 Dec 2010)
Hero
Swedish swimmer Anders Holmertz. (NOC, 14 May 2004)
Sporting philosophy / motto
"Have fun!" (NOC, 14 May 2004)
Awards
In 2002 he was named Sweden's Male Swimmer of the Year. (Swim Info, 16 Jun 2003)
General
OLYMPIC HISTORY
The 2012 Olympic Games in London will be his sixth Olympic appearance, which is more than any other swimmer. He made his Olympic debut in 1992 in Barcelona, Spain. "I'm incredibly proud that I am 100 percent and still able to qualify for another Olympics." (aftonbladet.se, 18 Jun 2012)
Previous Olympics
Beijing 2008, Athens 2004, Sydney 2000, Atlanta 1996, Barcelona 1992
