John Grotberg has faced 42 opponents throughout his career

Player Team(s) Games
Marvin Ahrens 1
B.J. Anthony 1
Lars Buss 1
Robin Christen 1
Song Cun 1
Al Elliott 1
Christoph Hackenesch 1
Chris Heinrich 1
Christopher Henneberger 1
Edmund Keferstein 1
Viktor Klassen 1
Maximilian Kleber 1
Fabian Klocke 1
Henje Knopke 1
Dennis Korber 1
Sebastian Korp 1
Johannes Lange 1
Nick Larsen 1
Pedja Lazic 1
Jurgen Malbeck 1
David Ruben Mann 1
Dimitry McDuffie 1
Matthias Michalowicz 1
Matthias Molle 1
Franz Montag 1
Mathias Perl 1
Maximilian Pink 1
Marko Radulovic 1
Christopher Rojik 1
Johannes Schlafer 1
Jorge Schmidt 1
Dominik Schneider 1
Rolf Scholz 1
Benedict Seebode 1
Solomon Sheard 1
DeUndrae Spraggins 1
Falko Theilig 1
Frank Theis 1
Fabian Thulig 1
David Watson 1
Bastian Winterhalter 1
Ronell Wooten 1