Rio Olympics
Usain Bolt (JAM) of Jamaica gestures after his team won the gold. (Reuters)

Rio Olympics
Jamaica's Usain Bolt kisses the track as he celebrates Team Jamaica winning the Men's 4x100m Relay Final during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 19, 2016. (AFP)

Rio Olympics
Asafa Powell (USA), Yohan Blake (USA), Nickel Ashmeade (USA) and Usain Bolt (JAM) of Jamaica celebrate after winning the gold. (Reuters)

Rio Olympics
Jamaica's Usain Bolt holds a model of himself as he celebrates winning the gold medal in the men's 4x100-meter relay final during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016. (AP)

Rio Olympics
Jamaica's Usain Bolt greets fans after winning gold in the men's 4 x 100-meter relay, during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016. (AP)

Rio Olympics
Usain Bolt (JAM) of Jamaica celebrates winning the Jamaican team's gold medal. (Reuters)

Rio Olympics
Jamaica's Usain Bolt waves a Brazil flag after winning the gold medal in the men's 4x100-meter relay final during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016. (AP)

Rio Olympics
Jamaica's Usain Bolt celebrates winning the gold medal in the men's 4x100-meter relay final during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016. (AP)

Rio Olympics
Jamaica's Usain Bolt and Asafa Powell celebrate winning gold in the men's 4 x 100-meter relay final, during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016. (AP)

Rio Olympics
Jamaica's Usain Bolt holds a model of himself as he celebrates winning the gold medal in the men's 4x100-meter relay final during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016.(AP)

Rio Olympics
Jamaica's Yohan Blake (L) and Jamaica's Usain Bolt celebrate after Team Jamaica won the Men's 4x100m Relay Final during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 19, 2016. (AFP)

Rio Olympics
Jamaica's Usain Bolt celebrates winning gold in the men's 4 x 100-meter relay final, during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016. (AP)

Rio Olympics
Jamaica's Asafa Powell, second right, Yohan Blake, right, Nickel Ashmeade, left, and Usain Bolt, second left, celebrate winning the gold medal in the men's 4 x 100-meter relay final, during the athletics competitions of the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, Aug. 19, 2016. (AP)

Rio Olympics
Jamaica's Usain Bolt celebrates after Team Jamaica won the Men's 4x100m Relay Final during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 19, 2016. (AFP)

Rio Olympics
Jamaica's Usain Bolt celebrates with supporters after Team Jamaica won the Men's 4x100m Relay Final during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 19, 2016. (AFP)