I learned a few other things too, from Wikipedia.
- When he was having control problems in 1976, he went to a Catholic priest who doubled as a hypnotist and after putting him under several times cured him of his fear of getting fit. The fear had been understandable - Joe had fractured his skull in 1971 after getting hit by a Ted Simmons liner, and was hit by a line drive a dozen times in 1974.
- When with the A's in 1978, Charlie Finley tried to send him to the minors, Vancouver, but he refused to report. Hey!
- He is the father of Casey Coleman who pitched 58 games for the Cubs and Royals in the early 2010s, making them and Joe's dad MLB's first trio of 3-generation pitchers
- Joe was the pitching coach of the Lakeland Tigers from 2007-2011
And here's Joe pitching a shutout in the '72 ALCS