The blog 100% Injury Rate has an entry about players from RBI still in the majors (http://100percentinjuryrate.blogspot.com/2007/05/dying-breed-original-players-from-rbi.html) (Julio and soon-to-be Clemens, as we all know). Someone has already mentioned Dee-Nee in the comments, and the post also has a YouTube clip of the RBI TV ad.