 He enjoyed one championship season with the minor team, culminating with the winning of a Munster medal in 2001. Cooper subsequently joined the Kerry under-21 team, winning a Munster medal in 2002.By this stage he had also joined the Kerry senior team, making his debut during the 2002 league.Over the course of the next fifteen years, Cooper won five All-Ireland medals, beginning with a lone triumph in 2004, back-to-back championships in 2006 and 2007, a fourth title in 2009 and a final championship as a non-playing substitute in 2014 due to injury.