 During the 1959–60 season Prinsloo scored 4-tries against Liverpool City and a hat-trick of tries against Hull FC, finishing the season with 29-tries from 38 matches.The following year brought more success with a hat-trick of tries against Workington Town, his last match for St. Helens was against Warrington on Saturday 7 January 1961.The transferring of both Prinsloo to Wakefield Trinity and Frank Carlton to Wigan paved the way for a £11,000 World Record transfer to bring Mick Sullivan to Knowsley Road.