It's a challenge thrown to many recruits in their transition from under-18 football to the elite level, however, Delaney was already a strapping 194cm and 96kg.
Spectators at Arden Street in recent weeks would have noticed the powerful defender doing skill work with his fellow draftees. He stands out, just as he did in his final year with Geelong Falcons in the TAC Cup.
Increasing his size is nothing new to Delaney. He recalls he was tall "but a little bit on the podgy side and a bit slow" in 2006, his first year with the Falcons.
The following pre-season he worked hard in the gym and has maintained that commitment since.
"Outside of what we usually do [at North], I probably try to get to the gym a couple of times a week," he said.
Delaney has added a kilo-and-half since his arrival and plans to reach 100kg with a key position in mind.
Michael Firrito (190cm, 96kg) and Josh Gibson (189cm, 92kg) have held down full-back and centre half-back for much of the last two seasons, and Delaney is aware of the support he can provide them.
"I've definitely got a good opportunity because of the size of the boys down back," he said. "My size and height definitely helps me out a lot, so I've just got to push for selection.
"After round 11 you can play a rookie either way, even if you don't have a long-term injury. If one of the boys does go down and I've got good form then hopefully I can get an opportunity."
After his 2007 season was ruined by injury, Delaney remained on Geelong's list as a 19-year-old with the blessing of coach Garry Hocking and regional manager Mick Turner.
It was his third season with the club after missing out on selection in its under-15 squad.
"[Garry and Mick] had a lot of faith in me," he said. "They thought that if I worked hard enough I'd definitely get the opportunity [at an AFL club]. Without them I wouldn't be here today.
"Last season I knew what Garry wanted from me and it was more about going out and performing at my best.
"I thought that if something happened [in the drafts] it was definitely going to be a bonus, but I wasn't holding out for the opportunity."
Delaney had been training with Geelong's VFL squad for a month when North's talent ID manager Bryce Lewis contacted him.
Used in a number of roles with the Falcons, including the ruck, Delaney caught the eye of a few clubs. Solid performances on Melbourne's No. 1 draft pick Jack Watts and key Richmond signing Tyrone Vickery (No. 8) encouraging the interest.
He's only had a handful of sessions with the main group, but Delaney has savoured his experiences with big men Drew Petrie and David Hale.
"I want to understand how they play the game, because they've been there and done it," Delaney said. "If I can fast-track my learning with those boys it'll definitely enhance my chances.
"It's definitely a step up from anything else I've ever done. With high expectations of the level of fitness you have to [reach] physically and mentally, it's been a good challenge but I'm enjoying it."
Delaney has relocated from Geelong and is currently sharing a club house with teammates Matt Campbell and Cruize Garlett.
