The transformation of South Sydney Rabbitohs fullback Greg Inglis to Gregzilla

THIS is the physical evolution of a superstar. How a scrawny 88kg kid put on 22kg to become the most powerful fullback in league history.

THIS is the physical evolution of a superstar.

How a scrawny 88kg kid put on a staggering 22kg to become arguably the most powerful fullback in rugby league history.

South Sydney’s Greg Inglis will terrorise his former club Friday night at ANZ Stadium - ironic because it was Melbourne who developed him into an NRL giant.

In 2005, Inglis weighed just 88kg. A year later he was 92kgs, then jumped to 99kg by 2009.

A year after he was 104kg and now the Rabbitohs fullback stands a colossal 110kg.

Has there ever been a bigger fullback in the game’s 105-year history?

‘’Greg came to the club as a tall, skinny kid on scholarship through Melbourne’s development program at the end of 2003,’’ said Storm head of strength and conditioning Alex Corvo.

‘’I remember his first cardio session in one of those development camps, he actually didn’t finish the session.

‘’Straight away Craig (Bellamy, coach) and some of the other staff were asking if this young bloke is going make it.

‘’He soon showed everyone he had what it takes and much more. He applied himself to everything that was required, quickly doubling his strength in all areas, especially his power output, which was outstanding.

“GI is also very smart; he understands his body and knows what is best to get the maximum benefits.’’

Greg Inglis

Inglis is a true rugby league great and is primed for a blockbuster Friday evening.

‘’When Greg’s mindset is determined and aggressive, coupled with his footwork and skills, he can be lethal,’’ said Maroons assistant coach Michael Hagan.

‘’Greg has soft hands and tremendous power and speed.’’

Inglis is actually 34kg heavier than Souths' greatest fullback, Clive Churchill.

Mark Carroll is a former Souths and Test player who runs Spudd’s Gym in Woolloomooloo. He is in awe of Inglis.

“Inglis has this natural inner-strength,’’ Carroll said. ‘’I hear he doesn’t lift too many weights. It all comes naturally.

‘’I have never seen anyone tackle him one-on-one. He is a big bastard…he is about six foot, three.

‘’I remember when I met him I took a step back and thought: ‘How big in this bloke?’ And he is a fullback. He is the X-factor for Souths. He terrorises opponents.

‘’If you’re kick-chase isn’t good, look out.’’

When Inglis arrived at Melbourne, he had never run a beep test or used a barbell. Things quickly changed though after Inglis was unable to complete his first session with the Storm.

He later recalled: “I was a twig and thought they’d punt me for sure. I walked inside that gym, looked around and thought, ‘What the hell do I do here?'”

Inglis’ manager Allan Gainey was asked Thursday to describe his client.

”He is a natural at everything he does,’’ Gainey said. ‘’He is easy-going yet switched on.

‘’Greg really is a unique human being.

‘’He is such a loyal bloke. And on the field I think he is still improving. Everyone loves him.’’