Player: Why does that Orc have a 22 Strength? Orcs are PCs, and we can only go up to 20?!
DM: That Orc, the son of the chieftain, received a special blessing from Gruumsh.
Player: Well, why can't I get a blessing from Grummsh for my Orc?
DM: You totally can.
Player: Is it like a feat or something?
DM: Go ask the blessed Orc and maybe he'll tell you how he got it.
And thus the Player starts on the path of a long quest chain to get the blessing from Gruumsh, which is really only worth about an uncommon magic item. Hooray!