Dylan Groenewegen -- a pro cyclist from the Netherlands -- was just hit with a 9 month ban for causing the horrific crash that left his rival in a coma.
The incident took place back in August ... 27-year-old Groenewegen squeezed fellow Dutch cyclist Fabio Jakobsen into a wall while on a finishing spring during the Tour of Poland -- causing Jakobsen to flip over some signage and crash face-first into a solid barrier.
Jakobsen sustained major injuries in the wreck -- including "severe" wounds to his face -- and was placed in a medically-induced coma to help his recovery .