George Thomas Cottrell (third ¼ 1881 – first ¼ 1963), also known by the nickname of "Rocky", was an English rugby union and professional rugby league footballer who played in the 1900s and 1910s. He played representative level rugby union (RU) for Gloucestershire and at club level for (associated with All Saints' Church, Cheltenham) and , as a full-back, or centre, i.e. number 15, or 12 or 13, and club level rugby league (RL) for Halifax (Heritage № 150), Hull F.C. (Heritage №) and Keighley, as a wing, or centre, i.e. number 2 or 5, or, 3 or 4.