The defender will debut against West Coast at Adelaide Oval on Saturday.

When Parnell debuted for Albury as a schoolboy in 2019, he was 175cms and only 56kgs.

He was selected by the Crows in last year's mid-season rookie draft at 64kgs.

Heading into the biggest game of his life, Parnell is now 178cms and 71kgs.

"Obviously I had to put on a lot of size and having put some weight on, I've been able to defend a lot better," he suggested.

"I suppose I feel like I have more of a physical presence, my one-on-one work is a lot better, I think the defensive side of my game is an area I needed to improve."

Parnell played only three senior games at Albury, two in year 11, and then the opening game last year, so he hadn't had much experience playing open-age level.

"Last year I was able to get a feel for it (in the SANFL) and then this year I feel like I've been able to show I can stand up against men, week in, week out," he revealed.

Like so many athletes who reach the elite level in their sport, the 20-year-old had one goal.

"I grew up as a kid dreaming of playing AFL, since I can remember really," he offered.

"Hanging around the Albury footy club and St Pat's junior footy club, all I ever wanted to do was play AFL and for it to finally come true is pretty exciting."

IN OTHER NEWS:

The match starts from 1.15pm.

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