Teams William Steinberg played for
| Under-14 County Cup | Essex Under-14s (2016) |
| Under-15 County Cup | Essex Under-15s (2017) |
| Under-17 County Cup | Essex Under-17s (2019) |
| Under-17 County Championship | Essex Under-17s (2018) |
| Miscellaneous | Essex Under-15s (2017) |
| English Schools Cricket Association London and East Under-15s (2017) |
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