Adams qualified to represent the Great Britain team at the 2012 Summer Paralympics, competing in the F34 shot put placing 14th in the final.

Adams was born 9+1⁄2 weeks premature and spent his early life requiring medical support before being diagnosed with Quadriplegic cerebral palsy.

During his early years Adams had several operations at West Suffolk Hospital in Bury St Edmunds to help improve his disability both with his cerebral palsy and Visual Impairments.

Following reclassification to an F34 from his previous F35 classification, he won silver in both the discus and shot put in his inaugural competition as an F34 athlete [4] That year he also entered competed on the IWAS European Series winning titles in Germany in 2011 and medals in the Netherlands.

During this event competing as an F35 Jonathan set a new British record of 12.62m and placed third in his first international meeting since the 2012 London Paralympic Games.