In 2012 he competed at his first Summer Paralympics, in London. He qualified for both the 100m and 200m T37 sprints as well as the T38 400m event. He qualified through the heats in all three events, but failed to finish the 400m and was disqualified form the 100m. In the 200m final Monterols set a regional record to finish in a time of 23.34, which saw him win the bronze medal.