Alfred Derwent Mitchell was a rugby league player. He represented the New Zealand rugby league team in 1 test against Australia in 1935. In the process he became the 238th player to represent New Zealand. Mitchell also played one match for Auckland Province in 1935. He played for the Richmond Rovers club in the Auckland Rugby League competition from 1933 to 1936. Mitchell enlisted in the New Zealand military and fought in World War 2.

The 1934 Auckland Rugby League season was its 26th. The senior championship was won by Richmond Rovers who ran away with the title with an 11 win, 2 loss record. Such was their dominance that a 14th round was not played as Richmond had a 6-point lead over their nearest competitor Newton Rangers. Richmond also won the Roope Rooster knockout competition with a 20 to 13 win over Marist Old Boys in the final. Their remarkable season also included the Stormont Shield which they won 21 to 5 over Newton Rangers. This was the first ever time that an Auckland club had won all three senior grade titles in the same season. The Richmond reserve grade team also won the title which was remarkable in that they lost their first two matches before reeling off 12 consecutive wins to claim the title. They also won the Stallard Cup knockout competition when they beat City Rovers Reserves 21 to 9. Richmond also recorded two wins over the touring Western Suburbs side who had won the New South Wales premiership with 18–16 and 10–3 wins. This was easily the strongest set of results of any club at the senior level in Auckland Rugby League's history to this point and arguably to this day.