I think your memory of Richert and Osteen is a little off
I can't tell from that which one you are saying was better. I remember Osteen as the ace of the Senators staff for a couple years, then with the Dodgers he was good but got lost among Koufax and Drysdale, until they left, and then had several good years. Richert was the ace of the Senator staff for a couple years, but then they traded him to the orioles where he too had a number of good years.