Westerhope, Newcastle upon Tyne born inside forward Fred Mitcheson was on the books at Wolverhampton Wanderers in 1932-33 without making a first team appearance before he joined Second Division Port Vale in July 1933, for whom he made his Football League debut at Manchester United in April 1934. He scored a hat-trick on his home debut on 21st April 1934, a 4-0 win over Plymouth Argyle at The Old Recreation Ground, as the 1933-34 season drew to a close. He was sold to Plymouth Argyle in November 1935 after 8 goals in 49 appearances for Vale.
Mitcheson spent five seasons in Plymouth, scoring 25 goals in 99 appearances, averaging a goal every four games, including a hat-trick in January 1939 in a 3-4 away win at Luton Town. He left for Ipswich Town in the summer of 1939 and played in all three of their games, scoring once, before the outbreak of the Second World War interrupted the 1939-40 season. With Ipswich not playing in any of the war leagues he remained on their books until the cessation of hostilities, and then joined Yeovil & Petters United in 1945. He did return briefly to Plymouth Argyle in 1948, working with training and ground staff.