Corrigan, 21, of Bateau Bay, scored three tries in the Tigers' 30-20 win against the Sydney Bulls at the Sydney Football Stadium in the 2007 season decider and his sparkling performance caught the attention of several NRL clubs.

Penrith and North Queensland are understood to have also expressed an interest in the tall, speedy centre but last season he played with North Sydney in the NSW Cup premier league competition and South Sydney was the Bears' feeder club.

Souths snapped up the young flier and he is now training five days a week with the Rabbitohs top 25 players squad under the watchful eye of coach Jason Taylor.

"It's a fairly full-on routine at the moment as I'm travelling almost daily to Sydney by train but I expect that I'll find accommodation in the Souths area with some of my team-mates soon," he said.

"At present 'JT' [coach Jason Taylor] is working on the basics with the squad and making sure we're all on the same wavelength.

"Jason has made the new players feel welcome at Souths and I'm glad to be playing with a club with such a proud history and culture."

Corrigan has realised a lifelong ambition to be contracted to an NRL club after a rugby league apprenticeship with The Entrance stretching from the under-six age division to the Jim Beam Cup competition, when he was named the Tigers' Rookie of the Year in 2007.

The Entrance head coach Jamy Forbes said Corrigan works hard on his game and has the talent to make the grade at the top level.

"He'll add plenty of speed to the Souths outside backs and Shaune is a sensible, level-headed young player who will make a fine recruit for the Rabbitohs."

Corrigan said his aim is to try to consolidate a first grade spot, either on the centre or the wing.

But he is intent on not rushing things.