Aldridge was born in Christchurch and attended Otumoetai College in Tauranga.[2] A right-arm fast-medium bowler and useful lower-order batsman, he holds the New Zealand domestic List A wicket-taking record, with 178 from 131 matches.[3] He also has the Northern Districts first-class record, with 355 wickets at an average of 28.31 from 119 matches.[4] His best first-class innings figures were 6 for 41 against Canterbury in 2011–12;[5] his best match figures were 11 for 145 (6 for 49 and 5 for 96) against Central Districts in 2009–10.[6]