Edgar signed this for me on May 7, 1990 outside the Kingdome when the Mariners played the Boston Red Sox.
A day earlier, Edgar had by far the worst day of his career playing third base against Baltimore, committing 4 errors that day.
Even though he was there taking extra fielding before the game, it is likely that this is the day the organization decided he was a DH
Congratulations on being the greatest DH of all effing time and being elected to the HOF.