Two right, final left

[Bladefingers]

Hi!
I was playing against one of my teammates yesterday, when he suddenly did an unexpected move:
During the final set, he totally blowed me out when he suddenly delivered with his left hand
Thus: Two throws with his right hand, then a delivery with his left.

Would this be accepted during tournament play?

/ Rock on ppl!

[Arbiter]

Unless tournament rules explicitly require a player to select a hand prior to play, switch-throwing is perfectly legal, provided that the hand that throws is the same one that participates in the prime.

[R Cohrs]

In martin's post RPS players from the past, he talks about Barry 'Bazza' Moulden's incredible tournament winning style with a surprise switchhanded throw.  Apparently this was a common place move that was widely practiced back in the day.