Crocker played for the Kew Comets and the Canterbury Cobras in the Yarra Junior Football League in his youth.

[1] Crocker played and captained the Oakleigh Chargers,[2] leading them to a premiership, kicking a goal against Eastern Ranges in the 2015 TAC Cup season Grand Final.

[3] He represented Vic Metro at 2015 AFL Under 18 Championships, serving as vice-captain together with Sam Weideman and Nick O'Kearney under captain Theo Thompson.

[13] Tyson Goldsack, Crocker's room-mate, former team-mate, and current development coach at Port Adelaide, claimed that he has what it takes to make it in the AFL.

[14] Crocker trained and worked hard after arriving in Adelaide, making captain Rory Sloane say he deserves a spot in the best 22.