Can you please list all pitchers who have hit a home run in the history of MLB playoffs?
Bonus: Include position players who started a postseason game as the pitcher and hit a homerun
The Baseball-Reference.com Batting Game Finder has data going back to 1903. To get the list of pitchers who have hit home runs in the postseason, make the following setting changes on that page:
select "Find Players with Most Matching Games in Multiple Years"
for "Batter's Defensive Position", make sure only "P" is checked (this will include any position player who hit a home run in a game that he made an appearance as a pitcher)
under "Select Additional Criteria Games Must Match", add a criteria for "HR >= 1"
After you click on "Get Report", you will find 19 pitchers who have hit postseason home runs. But it only shows 10 of those names, since you have to subscribe to see the entire list. Just go back to the search form, click the "Use ascending order" box, and click "Get Report" again to see the rest of the names.
The 19 pitchers are:
Edit: Since the original answer, 3 more pitchers have had postseason homeruns: