And his introduction to Warriors life started with a tongue-in-cheek handicapped sprint against front row powerhouse Jon Welsh at Toryglen.
Although Welsh won that particular contest, centre Dunbar has no doubts the Warriors had a prized asset on their hands in Isles.
"I have to say I don't think I have seen anyone as fast as Carlin before," Dunbar told the Glasgow Evening Times.
"I am sure his pace will be a real bonus for us once he has learned all the calls and rudiments of the 15-man game.
"Carlin looked really sharp and very, very quick. So we decided to test just how quick he was by putting him up against Jon Welsh in a race.
"To be honest it was over 50 metres and Welshy had a 40 metre start and to be fair to Carlin, he almost won. But unfortunately Welshy nicked it and we never heard the end of it and probably won't for the rest of the season.
"But he settled in really well and obviously it is a big plus that he has Folau Niua, his fellow American already in the squad. I am sure he has a big career ahead of him with Glasgow because he is a very exciting young talent."
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