Ah, bringing up world records for sprint times in a sport that has no PED issues. That's a great argument right there.
Add Darrell Green to the list of incredibly fast athletes from 30+ years ago.
I would venture to say that some athletes of yesteryear could hang with some players today. Just not as many of the players from yesteryear could do it. I'm fairly sure that Rickey Henderson would hold his own if he were playing today. I'm sure Deion Sanders would be able to hold his own.
I think Mateo is the fastest Oriole I've ever seen though. This is random, but I remember being at a game and seeing David Dellucci go from first to third and thinking that dude was really fast, too.