Teams John Howarth played for
| Main FC | Nottinghamshire (1966-1967) |
| Main ListA | Nottinghamshire (1967-1970) |
| Other ListA | Minor Counties East (1977) |
| Minor Counties Championship | Nottinghamshire Second XI (1966) |
| Cheshire (1976-1978) | |
| Second Eleven Championship | Lancashire Second XI (1964) |
| Nottinghamshire Second XI (1965-1969) | |
| Central Lancashire League | Castleton Moor (1964-1975) |
| Central Lancashire League Wood Cup | Castleton Moor (1972-1975) |
| County Championship | Nottinghamshire (1966-1967) |
| Miscellaneous | Lancashire Club and Ground (1964) |
| Nottinghamshire Under-23s (1965) | |
| Nottinghamshire (1966-1967) | |
| Nottinghamshire Club and Ground (1966-1967) | |
| Bassetlaw and District Cricket League (1967) | |
| Central Lancashire League (1971) |
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