Raison made his first-class debut for Essex against Oxford University in 1928. He made sixteen further first-class appearances, the last of which came against Yorkshire in the 1930 County Championship.[1] In his seventeen first-class appearances for Essex, he scored 451 runs at an average of 18.04, with a high score of 57.[2] This score, which was his only first-class fifty, came against Hampshire in 1928.[3] With the ball, he took 14 wickets at a bowling average of 41.07, with best figures of 5/104.[4] These figures, which were his only first-class five wicket haul, came against Gloucestershire in 1928, including the wicket of Wally Hammond who had scored 244 runs.[5]