Adam Jones

I met him at Tropicana Field in St. Petersburg, Florida in 2018, when the Baltimore Orioles came to play the Tampa Bay Rays.

Adam signed a 2015 Topps Opening Day card #19.

https://www.baseball-reference.com/players/j/jonesad01.shtml

Jacoby Ellsbury

I met him at a Minor League spring training game at Paul Owens Training Facility at Carpenter Complex in Clearwater, Florida in 2018, when the New York Yankees came to play the Philadelphia Phillies.

Jacoby signed a 2015 Topps Opening Day card #47.

https://www.baseball-reference.com/players/e/ellsbja01.shtml

Danny Santana

I met him at Bright House Field in Clearwater, Florida in 2016, when the Minnesota Twins came to play the Philadelphia Phillies in a spring training game.

Danny signed a 2015 Topps Opening Day card #30.

http://www.baseball-reference.com/players/s/santada01.shtml

Dilson Herrera

I met him at a Minor League game at Roger Dean Stadium in Jupiter, Florida in 2015, when the St. Lucie Mets, whom he was on a rehab assignment with, came to play the Palm Beach Cardinals.
This was my first visit to Roger Dean Stadium, home of the Palm Beach Cardinals and Jupiter Hammerheads (Marlins).

Dilson at the plate.

Knowing that this would most likely be Dilson's last day on his rehab assignment with St. Lucie, my brother and I made the 3+ hour drive to the east coast of Florida to watch him play and hopefully get his autograph.

Dilson signed a 2015 Topps Opening Day card #111.

http://www.baseball-reference.com/players/h/herredi01.shtml