Cochrane's parents enrolled him in swimming in an effort to alleviate his asthma. He began swimming competitively at age 16 and was educated at Southern Cross College in Scarborough.
It was not until his selection by Swimming Australia as an AWD (Athlete with a Disability) team competitor at the Arafura Games in Darwin, 2007, that his potential was realised.
After Beijing 2008, Cochrane continued to perform strongly in the pool. He was one of the stars of the 2009 World Short Course Championships, winning two gold medals and one silver. He has been honoured with Blue awards by both University of Queensland, 2010 and the University of the Sunshine Coast, 2011. He blitzed the field at the 2011 Para Pan Pacific Championships in Canada, winning five gold medals and breaking the world record in the 100m breaststroke. 2010 was an especially prolific year for Blake as he won gold in the 100m breaststroke at the World Championships, before snaring a bronze medal at the Commonwealth Games in Delhi. During the 2012 Australian Swimming Nationals he again set a new world record in the 100m breaststroke (SB8) final.Competing at the 2012 London Games, he competed in five events and won two gold medals in the Men's 100 m Breaststroke SB7 and Men's 4 × 100 m Freestyle 34 points.
Competing at the 2015 IPC Swimming World Championships in Glasgow, Scotland, Cochrane won the silver medal in the Men's 100 m Breaststroke SB7 and a bronze medal in the Men's 4 × 100 m Freestyle Relay 34 points. He finished fourth in Men's 4 × 100 m Medley Relay 34pts, fifth in the Men's 50m Freestyle S8 and Men's 100m Freestyle S8.
At the 2016 Rio Paralympics, Cochrane won the silver medal in Men's 100 m Breaststroke SB7. He also competed in Men's 4 × 100 m Freestyle (34 points) and finished fifth, seventh in Men's 400m Freestyle S8 but didn't progress to the finals in Men's 50m Freestyle S8 and Men's 100m Freestyle S8.
Cochrane competed at the 2020 Tokyo Paralympics in the Men's 100 m breaststroke SB7. He won the bronze medal with a time of 1:16.97, close to 5 seconds behind the winner Carlos Serrano Zarate of Columbia. He participated in the heats of the 34pts 4x100m Medley but not in the final.
Cochrane was coached by Nathan Doyle at USC Spartans.
In 2011, Cochrane was a nominee for The Age's Sport Performer Award in the Performer with a Disability category.
In 2011, he won Swimming Australia's Swimmer with a Disability of the Year Award. He has been awarded the 'Graham Sherman Sunshine Coast Senior Sports Star of the Year' for 2013.
Outside the pool, Blake holds a Bachelor’s degree in Clinical Exercise Physiology.
In December 2017, he graduated from University of the Sunshine Coast with Bachelor of Clinical Exercise Science.Cochrane and his wife Lauran have a son and daughter.
Cochrane announced his retirement from swimming in July 2022.
Blake Cochrane is listed on the wall of the Redcliffe Wall of Fame:
A collection of portrait and information honouring the achievements of individuals who have influenced and shaped Redcliffe. The collection is in the Jetty Arcade at 139-141 Redcliffe Parade.
For a complete list of people who appear on the wall click on the following blog post: