What's something that voice actors Don Messick (G1 Ratchet and Gears), Corey Burton (G1 Spike, Shockwave and Sunstreaker), and Jeffrey Combs (RiD Prime Ratchet) have in common?

They voiced Scarecrow, the Batman villain, at some point in their careers.

https://www.youtube.com/watch?v=Uu2tGYB5fjI