Steve Springer

I met him at the Bobby Mattick Training Center at Englebert Complex, the Toronto Blue Jays spring training facility in Dunedin, Florida in 2015.

Steve signed a 1991 Line Drive AAA Pre-Rookie card #72.

http://www.baseball-reference.com/players/s/sprinst01.shtml

Anthony Manahan

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

I met his brother, Austin, two years earlier.

Anthony signed a 1994 Classic Best Gold card #23.

http://www.baseball-reference.com/minors/player.cgi?id=manaha001ant

Tino Martinez

I met him at Dunedin Stadium at Grant Field in Dunedin, Florida, when the New York Yankees came to play the Toronto Blue Jays in a spring training game.

Tino signed the back of the September 1991 issue of Beckett Focus on Future Stars.

http://www.baseball-reference.com/players/m/martiti02.shtml

Bret Boone

I met him at Jack Russell Memorial Stadium in Clearwater, Florida in 1994, when the Cincinnati Reds came to play the Philadelphia Phillies in a spring training game.

Bret signed a 1993 Classic Best card #63.

http://www.baseball-reference.com/players/b/boonebr01.shtml