| Rank | Event | Year | Location | Result |
| Olympic Games | ||||
| 1 | 4 x 100m Medley Relay | 2008 | Beijing, CHN | 3:29.34 |
| 1 | 4 x 100m Medley Relay | 2004 | Athens, GRE | 3:30.68 |
| 2 | 100m Breaststroke | 2004 | Athens, GRE | 1:00.25 |
| 3 | 200m Breaststroke | 2004 | Athens, GRE | 2:10.87 |
| 4 | 100m Breaststroke | 2008 | Beijing, CHN | 59.57 |
| World Championships | ||||
| 1 | 100m Breaststroke | 2007 | Melbourne, VIC, AUS | 59.80 |
| 1 | 100m Breaststroke | 2005 | Montreal, QC, CAN | 59.37 |
| 1 | 200m Breaststroke | 2005 | Montreal, QC, CAN | 2:09.85 |
| 1 | 4 x 100m Medley Relay | 2005 | Montreal, QC, CAN | 3:31.85 |
| 1 | 4 x 100m Medley Relay | 2003 | Barcelona, ESP | 3:31.54 |
| 1 | 200m Breaststroke | 2001 | Fukuoka, JPN | 2:10.69 |
| 2 | 50m Breaststroke | 2007 | Melbourne, VIC, AUS | 27.69 |
| 2 | 100m Breaststroke | 2003 | Barcelona, ESP | 1:00.21 |
| 3 | 200m Breaststroke | 2003 | Barcelona, ESP | 2:11.11 |
Nickname
B [because everyone in the south of the USA calls him Brandon instead of Brendan, so he told people to call him just B instead]. (usaswimming.org, 28 Jun 2012)
Hobbies
Hunting, fishing, camping, going to the lake, photography. (usaswimming.org, 28 Jun 2012)
Education
Human Movement Studies - University of Texas, Austin, TX, USA
Family
Wife, Martha
Language(s) spoken
English, Spanish
Coach
Eddie Reese (USA) (nbcolympics.com, 22 Jun 2012)
Other sports
His older brother, Sean, is a swimming coach at Haverford Preparatory School, and his younger sister, Megan, swims at Southern Connecticut. (usaswimming.org, 28 Jun 2012)
Debut
1999 for United States, World Short Course Championships (Hong Kong, China) (brendanhansenonline.com, 01 Oct 2006)
Additional information
Ambitions
To enjoy the Olympic experience. "Honestly, medals, podiums, all that stuff is all fine, but what you really remember at the end of the day is the journey." (nbcolympics.com, 22 Jun 2012)
Training
He has found stretching and yoga helps him recover faster and allows him to do higher intensity workouts. He has also been doing work outside the pool to speed up his start times. (usaswimming.org, 04 Jun 2012)
Most influential person in career
His parents. (usaswimming.org, 28 Jun 2012)
Superstitions / Rituals
He always splashes water from the pool on himself before the race. (foxsports.com, 15 Jun 2012)
Awards
He was named Swimmer of the Meet at the 2004 World Short Course Championships. (usaswimming.org, 28 Jun 2012)
General
RETIREMENT AND RETURN
He quit swimming after the Beijing 2008 Olympic Games claiming he no longer had the motivation, and took up triathlon. He started swimming for fun again in January 2011, and it wasn't long before he was asking advice from his coach and wife about whether he should get back into it. His wife asked him whether he would be frustrated at 40 if he didn't get back into swimming and his reply was yes. She said to him "I don't want to live with that guy, so get your suit and go back in the water." (nbcolympics.com, 22 Jun 2012)
Previous Olympics
Beijing 2008, Athens 2004
