I read somewhere that Kent McCord appeared in a number of episodes as Ricky's frat brother, but can't find any mention of it on any O&H sites? Anyone know about this? Know what his character's name was? Thanks, Dottie!

Yes, he appeared in about 40 episodes. He went by his real name Kent McWhirter. If you look up Adam 12 or maybe Kent McCord on the internet you will find all of this