born in ipswich, jacobs began riding motorcycles at the age of four, and took up speedway as a junior, riding for rye house in the academy league in 2008, finishing as runner up in the british under-15 championship that year. he made his senior debut in 2009 with mildenhall fen tigers in the national league, moving to rye house cobras in 2010 after the fen tigers closed early in the season. that year he finished as runner up (to brendan johnson) in the british under-18 championship. he returned to the fen tigers in 2011 for a further two seasons before signing for the newly formed coventry storm in 2013. he also rode in the premier league in 2013 for glasgow tigers. in 2014 he rode in all three british leagues, riding for mildenhall fen tigers (nl), peterborough panthers then workington comets (pl), and wolverhampton wolves (elite league).