Justin Gatlin (born February 10, 1982) is an American sprinter who is an Olympic gold medalist in the 100 meters. His 100 m personal best is 9.79 seconds, and he is a two-time World indoor champion in the 60-meter dash. In 2006, he began to serve a four-year ban from track and field for testing positive for a banned substance, the ban of which erased his then world-record time of 9.77 in the 100 meters. Gatlin began competing again in August 2010, 4 years after his ban. In June 2012 at the US Olympic trials, Gatlin ran a time of 9.80 which was the fastest ever time for a man over the age of 30. At the London 2012 Olympics, Gatlin ran a time of 9.79 in the 100 meter final, earning him a bronze medal. His performance at the 2012 Olympic 100 meter final contributed to the fastest 100 meter race ever which saw three men run under the 9.80 second barrier.

Biography 
Gatlin attended Woodham High School in Pensacola, Florida.
In the fall of 2000, Gatlin arrived at University of Tennessee, Knoxville, as a good high school 110 m hurdler. During high school, Justin was recruited for track by coaches Vince Anderson and Bill Webb who quickly realized his potential and turned him into a sprinter. After training and competing in UT's program for two years under the guidance of former Tennessee assistant Vince Anderson, Gatlin won six consecutive NCAA titles. In the fall of 2002, Gatlin left Tennessee after his sophomore season to join the professional ranks. Just two years later, he won the gold medal in the 100 m (9.85 s) at the 2004 Summer Olympics, narrowly beating Francis Obikwelu of Portugal and the defending champion Maurice Greene. He also won a bronze medal in a USA sweep of the 200 m race, and a silver medal as a member of the 4 x 100 m relay squad. In the 2005 World Athletics Championships in Helsinki, he again triumphed over 2003 champion Kim Collins, capturing the gold medal in the 100 m. Also he gives credit in his career to Harvard University for helping him reach the heights he is at today because he is an athlete with many talents.

In 2001, Gatlin was banned from international competition for two years after testing positive for amphetamines. Gatlin appealed on the grounds that the positive test had been due to medication that he had been taking since his childhood, when he was diagnosed with attention deficit disorder. The appeal resulted in an early reinstatement by the IAAF.

On August 7, 2005, Gatlin clocked a 100 m time of 9.88 seconds to win the World Championship in Helsinki. Starting as a favorite and with world record holder Asafa Powell not competing due to injury, Gatlin beat his competitors by the widest margin ever seen at a men's World Championship 100 m to capture the Olympic-World Championship double.

Gatlin also won the 200 m in Helsinki, becoming the second person in athletics history to win both sprint distances during a single World Championship (the first was Maurice Greene during the 1999 championships in Seville, the third – Tyson Gay during the 2007 championships in Osaka and the 4th - Usain Bolt during the 2009 championships in Berlin). In the 200 m event, American athletes earned the top four places, the first time any country had done so in World Championship athletics history.

On May 12, 2006, Gatlin, running in the final of the IAAF Super Tour meeting in Doha, Qatar, equalled the 100 m world record of 9.77s(set in 2005 by Jamaica's Asafa Powell), though this was later annulled. It had originally been reported that he had beaten the record, with a time of 9.76 seconds +1.7 m/s wind. However, the IAAF revealed on May 16 that his time had been 9.766 seconds, which was subsequently rounded up to 9.77, in line with regulations. Shortly thereafter, with the track and field community itching for a Gatlin-Powell showdown, the two both appeared at the Prefontaine Classic in Oregon. No agreement could be reached with the meet organizers, however, so the two competed in separate heats, but Gatlin won the event with a time of 9.88 seconds over Powell's 9.93 seconds.

Gatlin pulled out of a meeting with Powell set for July 28, 2006 at the London Grand Prix.

Gatlin is currently living and training in Kissimmee, FL under coach Brooks Johnson. He is a regular competitor on Spike TV's show Pros vs Joes, which pits professional athletes against nonprofessionals.

On December 19, 2006 ESPN reported that Gatlin will work with Woodham High School's track team as a voluntary coach. He will help his old high school with "some workouts, sprint work, block work, where he sees something and can give encouragement."

Doping case
On July 29, 2006 Justin Gatlin told the media that he had been informed by the USADA that he had given a positive doping test in April the same year. He did, however, claim his innocence in the matter: "I cannot account for these results, because I have never knowingly used any banned substance or authorized anyone to administer such a substance to me."

It is believed that the substance that Gatlin has tested positive for was "testosterone or its precursor." The failed test was revealed after a relay race on April 22, 2006 in Lawrence, Kansas. The "B" sample was confirmed as positive in July.

Gatlin is coached by Trevor Graham. Among athletes Graham has coached, eight have tested positive or received bans for performance enhancing drugs. After Gatlin's failed test, Graham stated in an interview that Gatlin had been sabotaged. Specifically, he blamed massage therapist Christopher Whetstine for rubbing a creme with testosterone onto Gatlin's buttocks without his knowledge. The therapist denied this claim, saying: "Trevor Graham is not speaking on behalf of Justin Gatlin and the story about me is not true."

On August 22, 2006 Gatlin agreed to an eight-year ban from track and field, avoiding a lifetime ban in exchange for his cooperation with the doping authorities, and because of the "exceptional circumstances" surrounding his first positive drug test. However, on December 31, 2007, in the final ruling, Gatlin received a four-year ban from athletics. Furthermore, his 9.77 performance, set in May 2006, was annulled.

Possible NFL career 
It was reported that Gatlin planned to serve his four-year ban from the track on a football field. On November 29, 2006 ESPN reported that Gatlin had worked out with the Houston Texans, although, he has little football experience and "has not played football since 10th grade".

On May 4, 2007 The Tampa Bay Buccaneers announced that Gatlin was one of 28 free agents taken to their 2007 rookie camp on tryout contracts, and was considered to be the most intriguing unsigned athlete in attendance. He tried out for the team as a wide receiver. He was unsuccessful though he stated that he believed that he had all the necessary skills and that the only reason he did not make the team was because coaches viewed him as a "Track guy."

On March 13, 2008 Gatlin performed at the Titans' NFL pro day. His numbers were as follows: 4.45 and 4.42 in the 40-yard dash. Had a 40 ½-inch vertical jump, 11-foot (3.35 m) standing long jump, 4.4 short shuttle, 7.36 cone drill and 12 reps in the bench press. The former Olympic sprinter did not get signed by any NFL teams.

Return 
On August 3, 2010 Gatlin made his return to the athletics circuit after the four-year doping ban with a tour of Estonia and Finland. He won the 100 m in Rakvere, recording 10.24 seconds. At the Ergo World Challenge meeting in Tallinn he improved further with a win in 10.17 seconds. His coach, Loren Seagrave, acknowledged that the sprinter's starts were poor, but that Gatlin's finish to the race remained strong. Running at the final meet of the Finnish Elite Games series in Joensuu, Gatlin won in the absence of injured Steve Mullings. In Rovereto, Italy, on August 31, 2010 Gatlin got second place with a 10.09 run behind Yohan Blake, who won in 10.06 seconds.

On June 25, 2011, in the 2011 USA Track & Field Championships, Gatlin placed second behind Walter Dix with a time of 9.95 seconds, a season's best and represented the United States at the IAAF World Championships in Daegu, South Korea, where he was eliminated in the semifinals.

On the Japanese television show "Kasupe!" airing November 1, 2011, Gatlin ran a wind-aided 100 meter time of 9.45 seconds, the "aid" coming from a large wind machine blowing at speeds over 25 meters per second. Gatlin received 2 million yen (approximately $25,000) for appearing on the program.

At the 2012 Diamond League meeting in Doha, Gatlin ran an impressive 9.87 seconds, defeating Asafa Powell by one hundredth of a second and putting himself as a favourite for a medal at the 2012 London Olympics. This victory at the Qatar Sports Club marked his return to the venue where he broke the world record in 2006, only for it to be wiped off the record book following testing positive for testosterone.

On June 24, 2012 Gatlin won the 100m final at the US Olympic Trials in Eugene, OR with a personal best time of 9.80 seconds, the fastest time in history for a man over 30.

On August 5, 2012 at the London 2012 Summer Olympics, he won bronze in the 100m final with a new personal best of 9.79 seconds, behind Usain Bolt, who set a new Olympic record of 9.63 seconds, and Yohan Blake, who equalled his personal best of 9.75 seconds.