The older black actor from the brain age commercial and the Mario Kart's commercial is Garrett Morris. Probably most notable as Uncle Junior King from the Jamie Foxx Show.
Richard Brooks. He looks much older, but his voice, enunciation, and cadence is a spot-on match.
The chef in the commercial is actor and model Chris Gonzalez, NFL player Tony Gonzalez older brother ( Atlanta Falcons TE). Chris also was on a show called Mr. Romance on oxygen.
Cloris Leachman
John Slattery (very sexy older man)
Doris Roberts
Garrett Morris
It is Bill Cobbs.
Robert Ri'chard from cousin skeeter
Actor Gregory White
Burt Reynolds
I thought it was Burt Reynolds?
Charles Martin Smith The actor in this commercial is not Charles Martin Smith. Smith is older than this other actor.
Gregory White, 73, from Kentucky.
Billy Zane has done some Expedia commercials.
Harvey Sid Fisher
looks like an older Meatloaf
He looks like the actor Ed Nelson to me.