The Marlins signed some non-roster invitees yesterday.
The Marlins announced the signings of seven, six-year minor league free agents: LHPs Darin Downs and Victor Garate, RHP Frank Mata, IFs Ruben Gotay and Tim Torres,, OF/1B Josh Kroeger and OF Chris Lubanski.
Of that group, only Mata and Gotay have prior major league experience.
I doubt that any of them will stick, but you never know. But I think I can guess this one.