|Dam||Refused the Dance|
|Damsire||Defensive Play (USA)|
|Foaled||23 August 2003|
|Breeder||Bloodstock Resources Ltd and Cambridge Hunt Ltd|
|Owner||Lloyd J. Williams et al.|
|Trainer||John D Sadler|
|Victoria Derby (2006)
Melbourne Cup (2007)
Turnbull Stakes (2009)
|Last updated on 4 October 2012|
Efficient (foaled 23 August 2003) is a grey Thoroughbred racehorse gelding, bred in New Zealand, who won the 2007 Melbourne Cup and the 2006 Victoria Derby, both times ridden by Michael Rodd.
In his first campaign in the spring of 2006 he put together five consecutive wins including the Group 2 Aami Vase at Moonee Valley and ending with a win in the VRC Derby by 2½ lengths. Following his Derby win Efficient was entered into the Melbourne Cup field, run three days later. However, he did not pull up well enough and so was scratched from the race and spelled instead.
Returning in the autumn Efficient had a very light campaign of just two starts. In the 1,400 metre Group 3 Schweppervescence Cup he finished fourth behind Haradasun and fifth behind Miss Finland in the Group One Australian Guineas over 1,600 metres.
As a four-year-old in the Spring of 2007 Efficient resumed in the Memsie Stakes at Caulfield and ran 10th beaten 7 lengths. At his next start he ran fourth in the Group 2 Dato Tan Chin Nam Stakes behind El Segundo and Haradasun. He then ran unplaced in the 2,000 metre Group 1 Turnbull Stakes. Three weeks later Efficient lined up in the Weight for Age Group 1 Cox Plate over 2,040 metres at Moonee Valley where he finished 9th beaten 6½ lengths by the winner El Segundo. Efficient's next start was the Melbourne Cup, his first start in a handicap race since his first campaign. He dropped 3 kg from the Cox Plate run to carry 54.5 kg. Due to his poor recent form he was sent out a 16-1 chance. Reunited with jockey Michael Rodd for the first time since their 2006 Victoria Derby win, Efficient settled back in the field and travelled well. He was pulled to the outside to make a run and in the closing stages Efficient went on to defeat Purple Moon by half a length.
His win dividend of $22.70 was the biggest for a Melbourne Cup winner in over ten years. He became the first grey to win the Melbourne Cup since Subzero in 1992 and the first horse since Phar Lap to win the Melbourne Cup the year after winning the Victoria Derby.
Efficient was trained by expatriate New Zealand trainer Graeme Rogerson to win the cup, but switched to John Sadler soon after Rogerson decided to part company with the horse's owners, a syndicate headed by Lloyd and Suzy Williams.
Efficient has had an injury-plagued career since his Melbourne Cup win, and was withdrawn from both the 2008 and 2009 Melbourne Cups in the fortnight leading up to the race. However, he did gain a third Group One success in the 2009 Turnbull Stakes. After this success Efficient did not race for almost two years.
He returned to racing in September 2011 but did not show any form until he ran second to Niwot in the 3200 metre Sydney Cup at Randwick in April 2012. On 4 October 2012, Efficient's owner Lloyd Williams, announced that the horse had suffered a recurrence of an old injury and had been retired.  He now resides with other former champion horses at Living Legends, the International Home of Rest for Champion Horses located in Woodlands Historic Park, Greenvale, Victoria, Australia. He occasionally makes public appearances at events such as the Melbourne Cup Parade.
- Efficient race record
- ASB: Efficient (NZ) Retrieved on 2009-10-6
- "Efficient horse form guide, history, breeding and career stats". Punters.com.au. Retrieved 25 April 2014.
- 2007 Melbourne Cup result
- "Efficient wins Melbourne Cup". The Age. 6 November 2007. Retrieved 2007-11-06.
- Andrew Eddy (5 November 2006). "Hayes fears Efficient". The Age. Retrieved 2007-11-06.
- "Battle weary 2007 Melbourne Cup winner Efficient bows out after old injury flares up". Herald Sun. 4 October 2012. Retrieved 2012-10-04.
- Living Legends website
- "Melbourne Cup parade ahead of world class event". Department of Premier and Cabinet (Victoria). 31 October 2016. Retrieved 2016-11-03.
Australian Stud Book: http://www.studbook.org.au/Horse.aspx?hid=884214