In the latter part of his career he detested batters trying to lay down a bunt. During a radio interview after he retired, he was asked about it by Dan Patrick and Rob Dibble (another bad ass.) The question implied that whenever a batter failed to get a bunt down on the first attempt the next pitch was usually “chin” music. He replied that was because he wasn’t about to allow any hitter to, “Make this old man field his position.”
Everybody knows knows about the career no-hitters and strikeouts but he also still holds the single season strikeout record (383) and is tied with Bob Feller for career 1 hitters with 12.
In his last start he suffered a torn ulnar lateral ligament which was never repaired. Later he would briefly become an assistant baseball coach at TCU when sons Reid and Reese played for TCU. Occasionally he threw team batting practice and was still able to reach 90 mph.
Starting in high school pitchers are taught to throw high and in if they think a bunt is coming. It's very difficult to make contact with that and if the batter does it's usually a foul or pop-up.