The Glasgow-born centre / winger made his full Scottish debut last year after coming through the nation’s youth ranks.
Lyon-Fraser first played for the Scorpions on the dual registration rule from Wigan in 2012, but impressed in friendly matches against the Scorpions this and last year scoring tries on each occasion. In one of this year’s games this was after just 50 seconds of play.
So the Scorpions have secured his services for the whole of 2013 and have signed him on full terms.
Scorpions’ coach Dave Clark said: “We’re delighted to have signed Shae for the 2013 season. I’m sure that he will be a fantastic asset to the side and I know that he is welcoming the potential to play first team Rugby League throughout 2013.
“Shae’s signing means that we now have the potential to have players in five World Cup squads at the end of the year. James Tutuila is a Tongan international, Chris Vitalini has ambitions to play against Wales at the Millennium Stadium for Italy, Haydn Peacock has Irish grandparents and has declared his interests for the men in green, plus of course we have a number of Welsh international players.
“We’re now all looking forward to our first match of the season, against London Skolars at The Gnoll in Neath this Sunday.”
John Winder, Head of Youth Development for Wigan Warriors, said: “This is a great opportunity for Shae to get some first team experience and we wish him well at the Scorpions.”