[1] Will played his junior football at local club PHOS Camden.
He was part of the SANFL junior development programs at Glenelg before transferring to West Adelaide, (where his grandfather had played) for better opportunities.
As a young player coming into the system, Day would normally start by playing with the Hawthorn affiliate, Box Hill Hawks, but because that competition had been suspended for the year he had to show his mettle with scratch matches against other AFL clubs.
Day made his AFL debut in Round 6, 2020, against Collingwood at Giants Stadium.
[8] Notes Hawthorn Individual * denotes rookie listed players