Gennett sliced a knuckle on a metal rack after Sunday's game in Pittsburgh. He was out of Monday's lineup in Milwaukee.
''I went to grab some body wash like I would normally grab body wash,'' Gennett said. ''It was definitely a freakish thing. It started bleeding everywhere. I didn't feel any type of pain. I have my strength but something like that reopening and getting worse isn't what we want.''
Gennett hopes to return to the lineup by Wednesday. Milwaukee manager Ron Roenicke didn't sound as certain.
''He doesn't understand how in the world you can possibly get hurt in the bathroom,'' said Roenicke, who didn't rule out a possible DL stint for Gennett.
''There's always that chance. Obviously, we're at a spot now where we don't want to play short,'' he said. ''If we feel like we need to, then that's what we'll do.''