In November 2013, he attended the Gala Sports Columbine, which was held in the Auditorium and Congress Palace Infanta Doña Elena, and where he received a standing ovation.
He has an intellectual disability. In 2013, he was awarded the gold Real Orden al Mérito Deportivo. Antonio competes in T20 (track) and F20 (field) events.
He has held the F20 Long Jump world record since 2005.
He competed at the 2008 INAS World Indoor Championships held in Tallinn, Estonia, earning gold in the 60 meters and long jump, and picking up a bronze in the 4x400 meter event. Expósito competed in 2010 INAS European Championship and picked up a pair of gold medals in the long jump and 100 meter events.
He qualified for and competed in the 2011 IPC World Championships where he was one of thirty-two competitors representing Spain. He competed in the 2011 INAS World Games, winning a silver medal in the 4x100 meter relay alongside Francisco Santiago, Alberto Palomo and Dionibel Rodríguez Rodríguez.
He competed in the 2012 Spanish national championships held in San Javier.
In 2012, he was a recipient of a Plan ADOP €23,000 athlete scholarship with a €3,000 reserve and a €2,500 coaching scholarship. He competed in the 2013 World Championships for people with intellectual disabilities hosted by the Czechoslovakian Republic. He picked up a gold medal at the event in the long jump.
He injured himself after his final jump.
In July 2013, he participated in the 2013 IPC World Championships. Paralympics
Expósito was part of the Spanish team at the 2000 Summer Paralympics.
Following a cheating scandal at the Sydney games, events for athletes with intellectual disability were excluded from the Paralympic program
He won the 2010 European championships in the 100 meters and long jump events. Expósito has won the Spanish national championships in his classification. He competed in the javelin and shot put but it was in the 100m and long jump where he won gold medals. They were reinstated at the 2012 Summer Paralympics where, as in 2000, Jose Antonio won a gold medal in the F20 Long Jump event.