His major roles include Light Yagami in Death Note, Rock in Black Lagoon, Kicker Jones in Transformers: Energon, and Nightcrawler in X-Men: Evolution.

[3] In the 1990s, he voiced Mousse in Ranma ½ and Teen Gohan in the Ocean dub of Dragon Ball Z.

One of his earliest anime roles was in the English dub of Ranma ½ where he voiced Mousse.

When the Ocean Group dubbed Dragon Ball Z in the mid-1990s, Swaile voiced Adult Gohan.

In the late 2000s, he voiced the lead characters Rock in Black Lagoon and Light Yagami in the hit anime Death Note.