Starting his career in rugby union, he played for the Cardiff club and after being capped for Wales in 1971, Bevan toured Australia and New Zealand with the British Lions. He played in 14 matches including the first test and scored a total of 18 tries. The 17 scored in New Zealand equalled the record of Tony O'Reilly. He was a speedy wing (number 11) from Tylorstown South Wales and is chiefly remembered for his role in the Barbarians' victory over New Zealand in 1973, during which he scored a try.