Rael started his career in his native province of Munster, being part of the team's academy and played for the amateur club Garryowen in the All-Ireland League. Ahead of the 2013–14 season, Rael signed a one-year development contract with fellow Irish provincial side Connacht. He made his debut for Connacht on 28 September 2013, coming off the bench against Ospreys in the 2013–14 Pro12.