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Grayson voices a variety of characters in the English dubbed version of the various Yu-Gi-Oh! series.
Grayson's first and most notable role was portraying Joey Wheeler in Yu-Gi-Oh!. His second major role in the series was as the voice of Dartz, the main antagonist in the Waking the Dragons story arc. He also portrayed Shadi and Hermos within the same series. Grayson also temporarily replaced David Wills as the voice of Roland from episodes 128 to 148 until Wills' return in episode 167.
Grayson's two most notable roles in this series were as the voices of Syrus Truesdale and Lyman Banner. He also provided the voices of Elemental Hero Sparkman, Skull Knight (and his disguise form, Ancient Brain), Pharaoh, Crystal Beast Emerald Tortoise, and the Alien of Light. Grayson also reprised his temporary role of Roland in episode 76.
Yu-Gi-Oh! 3D Bonds Beyond Time
In Yu-Gi-Oh! ARC-V, Grayson provides the voice of Pierre L'Supérieure.