Another potential interesting use case I've been thinking about would be a critical situation where you absolutely need a K. Say the game is close and you have runners and 2-3 and 0 or 1 outs. Obviously the walks are a potential concern, but any reliever is going to be a gamble and he's much more likely to just blow people away and get out of it, especially when he knows it's just a couple batters. Could be a huge weapon, especially in the NLDS where we don't need a 4th starter.