In June 2011, he set a new personal best over 100 meters at the National Training Center Sprint Series in Clermont with 9.96 seconds, making him the eleventh Jamaican to ever run the 100 meters under ten seconds. At the World Championships 2011 in Daegu he reached the final over 200 meters and came in fifth with a time of 20.29 s. At the Memorial Van Damme he set his new best with 19.91 s over 200 meters and came in third behind Blake and Dix .
2012
At the fourth Diamond League Meeting in 2012 in Eugene, he set up his new best performance in second behind Justin Gatlin with 9.93 s. In the Jamaican Trials he could not qualify for the 200-meter distance at the Olympics on July 1. After a strong cornering he could not keep his pace on the straight and finished fourth with 20.16 s. At the Herculis in Monaco on July 20, he won in 20.02 s ahead of Martina and Spearmon . On August 23, he was only third at the Diamond League Meeting in Lausanne with 19.94 s, three days later he was able to improve and won in Birmingham with 20.12 s. At the season finale of the Diamond League over 200 meters in Zurich , he crossed the finish line in second place, winning the $ 40,000 overall ranking ahead of Usain Bolt . He had to admit defeat to this one in the race despite a new best performance of 19.85 s.
2013
In 2013 he followed up on his good performance. On May 4th, he contested his first race at the Jamaican Invitational , which he won with 20.00 s in front of his compatriot and competitor Warren Weir , who had secured third place for the Olympics in the 2012 trials off Ashmeade. On May 25th, he started over 100 meters at the Adidas Grand Prix in New York. On the wet track, he qualified in the semifinals with 10.20 s and first place in his run for the final, where he was only sixth with 10.30 s. On June 1, he won the Prefontaine Classic in Eugene with 20.14 s.
At the Jamaican Championships he was third in the 100 meter final with 9.99 s and was able to qualify for the World Championships in Moscow . He also secured second place in the World Cup over 200 meters. In the final he crossed the finish line after 20.06 seconds behind Warren Weir, whom he had defeated in the semi-finals. At the two Diamond League meetings in Lausanne and Paris at the beginning of July, he was only fifth. In Lausanne he competed over 100 meters, in Paris over 200 meters. At the World Championships , he set a new personal best in the semifinals with 9.90 s and moved into the final as the fastest. There he was fifth with 9.98 s. In the 200 meter competition, he missed a medal by a hundredth of a second. With 20.05 seconds he crossed the finish line behind the American Curtis Mitchell . He then won his longed for medal together with the 4 x 100 meter relay with the cast of Carter , Bailey-Cole and Bolt. In Zurich he showed a good race at the end of the season with a second place in 9.94 s behind Usain Bolt and in front of Justin Gatlin , before he improved his season best in Brussels with 19.93 s and with a second place behind Warren Weir also second in the Diamond Race rating was.
2014
In February 2014, he made his first indoor start as a professional in Boston. He finished his only race in the indoor season in fifth in 6.62 seconds. At the start of the outdoor season, he competed in Doha over the 200-meter distance. With a victory, he underscored his ambitions to win the Diamond Race title in at least one of his two disciplines. At the IAAF World Relays , which was held for the first time , he won both the 4-by-100-meter and the 4-by-200-meter run with the Jamaican relay team. With 1: 18.63 min he set a new world record with Yohan Blake , Warren Weir and Jermaine Brown over the latter, non-Olympic route. In New York he had to admit defeat with 19.95 s permanent competitor Weir. At the national championships in Kingston, which had no possible qualifications as an additional incentive in the Olympic and World Cup-free year, he won against a weak field - Usain Bolt, Yohan Blake and Nesta Carter were absent due to injury, Asafa Powell due to a doping ban - in 10 , 06 s the title over the 100-meter distance. In Lausanne he came in behind Alonso Edward and in Monaco behind Justin Gatlin in second place, yet he took the lead in the 200-meter Diamond Race. In August he was part of the Jamaican team at the Commonwealth Games in Glasgow. Over 100 meters he missed the gold medal he had hoped for in third place, but with the 4 x 100 meter relay he won the second title of the season after the World Relays.
After beating Alonso Edward in Birmingham, he had the chance to win the Diamond Race at the season finale in Zurich. 20.01 s were not enough there, however, Edward who was 6 hundredths of a second faster secured the overall title by taking first place in the race and one point ahead. Ashmeade won approximately $ 60,000 in prize money over the season.
Jamaica
| 1920: Paddock , Scholz , Murchison , Kirksey ( USA )
| 1924: Hussey , Clarke , Murchison , LeConey ( USA ).svg){kind=small}
| 1964: Drayton , Ashworth , Stebbins , Hayes ( USA )
| 1968: Greene , Pender , Smith , Hines ( USA )
| 1984: Graddy , Brown , Smith , C. Lewis ( USA )
| 2000: Drummond , Williams , B. Lewis , Greene ( USA )
| 2008: Bledman , Burns , Callender , Thompson ( TRI )
| 2012: Carter , Frater , Blake , Bolt ( JAM )