Fedde used all 3 options before completing his fifth pro season, so he is that rare dude who gets a fourth option year. He'd otherwise be out. Voth is out. Rainey has one left - used one in 2018 with the Reds and one last year.
so, if all 3 are healthy and pitching OK, Fedde gets option and Voth and Ross get kept. I assume Finnegan has options, too?