Prattl made his first grade debut in 1969 for Balmain. Balmain would go on to reach the 1969 NSWRL grand final against
South Sydney but Prattl missed the match due a broken leg which occurred in a game against
Newtown about a month before the decider. Balmain would go on to win their 11th and final premiership defeating a highly fancied Souths team 11–2 at the
Sydney Cricket Ground. Prattl played with Balmain until the end of 1971 and then signed with Western Suburbs. Prattl only played the one season at Wests before joining Cronulla-Sutherland. Prattl only played 3 games across 2 seasons at Cronulla and did not play in the club's maiden grand final appearance. Prattl played for English club
Bramley during the
1974–75 season. In 1975, Prattl joined Parramatta and featured in 6 games before departing the club. Prattl then went on to play rugby league in the Illawarra competition. ==References==