Trevor Wilson

I met him at the Perfect Game National Showcase at Tropicana Field in St. Petersburg, Florida in 2022. He was there watching his son, Paul.

Trevor signed a 1990 Donruss card #414.

https://www.baseball-reference.com/players/w/wilsotr01.shtml

Mike Laga

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.

Here is the card that I sent to Mike Laga.

Sixteen days later my card came back signed.

Mike signed a 1986 Donruss card #578.

https://www.baseball-reference.com/players/l/lagami01.shtml

Jim Adduci

In March of 2021, I decided to seek out an address for Jim Adduci. I sent him my card and the following letter.

66 days later my card came back signed.

Jim signed a 1987 Donruss card #495.

https://www.baseball-reference.com/players/a/adducji01.shtml

Randy Asadoor

In May of 2021, I decided to seek out an address for Randy Asadoor. I sent him my card and the following letter.

Eight days later my card came back signed.

Randy signed a 1987 Donruss card #574.

https://www.baseball-reference.com/players/a/asadora01.shtml

John Farrell

I met him at a Minor League game at LECOM Park in Bradenton, Florida in 2019, when the Daytona Tortugas, whom he was the Cincinnati Reds pitching consultant for, came to play the Bradenton Marauders.

John signed a 1990 Donruss Baseball's Best card #19.

https://www.baseball-reference.com/players/f/farrejo03.shtml

Marv Foley

I met him at the Florida Minor League Camp at Baseball City in St. Petersburg, Florida in 2019.

Marv signed a 1981 Donruss card #399.

https://www.baseball-reference.com/players/f/foleyma01.shtml

Bruce Walton

I met him at a Minor League game at Spectrum Field in Clearwater, Florida in 2018, when the Jupiter Hammerheads, whom he was the pitching coach for, came to play the Clearwater Threshers.

Bruce signed a 1992 Donruss The Rookies card #123.

https://www.baseball-reference.com/players/w/waltobr01.shtml

Gene Roof

I met him at a Minor League game at Spectrum Field in Clearwater, Florida in 2017, when the Lakeland Flying Tigers came to play the Clearwater Threshers.
He was there as the Detroit Tigers Minor League outfield and baserunning coordinator.

I met his brother, Phil a year earlier.

Gene signed a 1982 Donruss card #615, which incorrectly lists his first name as Phil.

http://www.baseball-reference.com/players/r/roofge01.shtml

Haris Medunjanin

I met him at the Joe DiMaggio Sports Complex, the Philadelphia Union's spring training home in Clearwater, Florida in 2017.

Haris signed a 2015 Donruss International Superstars card #67.

https://en.wikipedia.org/wiki/Haris_Medunjanin

Pete Rose

I met him at the Dinner with Chris Archer & Friends - Ted Williams Hitters Hall of Fame Induction at Tropicana Field in St. Petersburg, Florida on February 18, 2017.

I met his son, Pete Jr., 17 years earlier.

Pete signed a 1985 Donruss card #254.

http://www.baseball-reference.com/players/r/rosepe01.shtml

Pete Schourek

I met him at the New York Mets fantasy camp at Tradition Field in Port Saint Lucie, Florida in 2017.

Pete signed a 1992 Donruss card #535.

http://www.baseball-reference.com/players/s/schoupe01.shtml

Ken Kravec

I met him at a Minor League game between the Fort Myers Miracle and the Bradenton Marauders at McKechnie Field in Bradenton, Florida in 2016.

He was there as a scout. I had seen him many times scouting at Clearwater Threshers games, so I decided to order a baseball card of him and carry it with me until I saw him again. I didn't have to carry it long. I had the card for about 2 weeks before I spotted him scouting at the Marauders game.

Ken signed a 1982 Donruss card #378.

http://www.baseball-reference.com/players/k/kraveke01.shtml

Wei-Chung Wang

I met him at a Minor League game at Bright House Field in Clearwater, Florida in 2015, when the Brevard County Manatees came to play the Clearwater Threshers.

Wei-Chung signed a 2014 Donruss card #246.

http://www.baseball-reference.com/players/w/wangwe01.shtml

Alvaro Espinoza

I met him at a Minor League game at Jack Russell Memorial Stadium in Clearwater, Florida in 1999, when the Vero Beach Dodgers, whom he was managing, came to play the Clearwater Phillies.

Alvaro signed a 1990 Donruss Baseball's Best card #123.

http://www.baseball-reference.com/players/e/espinal01.shtml

Alonzo Powell

I met him at a Minor League spring training game at Carpenter Complex in Clearwater, Florida in 1999, when the New York Yankees came to play the Philadelphia Phillies.

Alonzo signed a 1992 Donruss card #213.

http://www.baseball-reference.com/players/p/powelal01.shtml

Rico Brogna

I met him at Carpenter Complex, the Philadelphia Phillies spring training facility in Clearwater, Florida in 1997.

Rico signed a 1993 Donruss card #41.

http://www.baseball-reference.com/players/b/brognri01.shtml

Mel Stottlemyre, Jr.

I met him at a celebrity golf tournament at Lansbrook Golf Course in Palm Harbor, Florida in 1997.

I met his brother, Todd, several years prior at the same course.

Mel signed a 1991 Donruss card #257.

http://www.baseball-reference.com/players/s/stottme02.shtml

Brian DuBois

I met him at Carpenter Complex, the Philadelphia Phillies spring training facility in Clearwater, Florida in 1995.

Brian signed a 1990 Donruss card #38.

http://www.baseball-reference.com/players/d/duboibr01.shtml

Phil Bradley

I met him at a Minor League game at Englebert Complex in Dunedin, Florida in 1994, when the GCL Cubs, whom he was managing, came to play the GCL Blue Jays.

When I showed up to this game, I wasn't aware that Phil Bradley was the manager and didn't have a card to get signed by him. Thankfully, there was a baseball card store within walking distance of the complex, so I headed over there and luckily found a card of him.

Phil signed a 1986 Donruss card #191.

http://www.baseball-reference.com/players/b/bradlph01.shtml

Andre David

I met him at a Minor League game at Jack Russell Memorial Stadium in Clearwater, Florida in 1994, when the St. Lucie Mets, whom he was the hitting coach for, came to play the Clearwater Phillies.

Andre signed a 1987 Donruss card #519.

http://www.baseball-reference.com/players/d/davidan01.shtml