Billionaire Luke Comer lost an appeal against the Irish Horseracing Regulatory Board to overturn a three-year-suspension of his training license, the organization confirmed in a statement Thursday. The suspension is scheduled to begin July 15. The three-person appeals body was chaired by Justice Peter Kelly in addition to Laurence McFerran and Dr. Paddy Molony. Suspended last September, the trainer was ordered to pay in excess of €750,000 in fines and legal costs after traces of the prohibited substances methandienone (MD) and methyltestosterone (MT) were found in 12 of his horses....