Zoltán Stieber

I met him at the Walter C. Campbell Sr. Park, D.C. United's spring training home in Clearwater, Florida in 2019.

Zoltán signed a 2016 Panini Prizm UEFA Euro card #231.

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

Admir Mehmedi

I met him at Al Lang Stadium in St. Petersburg, Florida in 2017, when Bayer 04 Leverkusen played Estudiantes in a Florida Cup game.

He originally signed my card with someone else's silver pen but the autograph was hardly visible, so I approached him again, asking if he'd re-sign it with my own pen.

Admir signed a 2016 Panini Prizm UEFA Euro card #158.

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