Fellows was a right-handed batsman and a roundarm right arm fast bowler.
"[1] Having made his name as a schoolboy cricketer at Eton College, where he bowled in tandem with Walter Marcon in 1841 and 1842,[2] Fellows was mainly associated with Marylebone Cricket Club (MCC).
[3][4] Fellows was noted for his fearsome pace, especially on rough pitches.
He is said to have reached his peak early and, after he changed his action by raising the height of his arm during delivery, he lost much of his speed and accuracy.
[5] Fellows made 67 known appearances in first-class matches from 1847 to 1869.