 Although a keen dribbler, Alcock is notable as being the first footballer ever to be ruled offside on 31 March 1866, confirming that players were probing ways of exploiting the new offside rule right from the start.As early as 1870 Alcock stated that he preferred playing football in a "scientific" way.An example of this was reported in a contemporary account of the November 1870 football match between England and Scotland "Mr Alcock made a splendid run ... and being cleverly supported by Mr Walker, a goal was obtained ... by the latter" A further contemporary reference shows that Alcock himself was playing "in concert" with his teammates during the 1871 international match between England and Scotland