My dad's birthday is June 14th. He passed away on August 31, 2020. For his first birthday without him, I came up with another TTM challenge for myself. This one I called "Dad TTM Project." On June 8, 2021, six days before his birthday, I sent birthday cards to eleven baseball players who also shared his birthday.
I discovered that Derek Gordon was a pitching coordinator at a sports facility in Kansas, so I mailed the birthday card to the facility.
Eighteen days later my card came back signed.
Derek signed a 2017 Lincoln Saltdogs card.
https://www.baseball-reference.com/register/player.fcgi?id=gordon003der