I'm thinking relievers here. Let's see...Gossage, Eckersley. Rivera isn't in the HOF yet, he must have pitched in 1000 games. Mike Timlin was around a long time. Trevor Hoffman, Jesse Orosco was around forever. How am I doing so far?
I don't think Rivera's record of 652 saves will be broken. While not a record, I don't think we'll see another .400 hitter. Too many specialists in the game. I don't think Cal's consecutive game streak will be touched either.