Also a Steppenwolf subscriber here and always enjoyed seeing him, but will never forget his performance in The Drawer Boy in the early 2000s. It was John Mahoney, Frank Galati and Johnny Galecki and was just a really first rate production.
That's the one he did at Paper Mill too, although I'm pretty sure it was a different production. The rest of the cast certainly was different. I remember liking him but not the play.