Probably Cabrera and some Castro. Kendrick was terrible at second, he'd be worse at third. Castro has 366 career innings at third, OK as a fill in but not the guy you look for going into the season.
Good point about keeping Kieboom down until early May to gain a service year.
Brooks Robinson and Craig Nettles were talking about playing 3B and how they both hated it when Frank Howard hit. They said that more than any hitter they feared Big Frank.
And despite K'ing Hondo in the '71 All Star Game, Tom Seaver said he was just relieved that Frank didn't hit the ball his way and maybe take his head off.
Not understanding why The Nats dont just put Kieboom at 2B and let the vets fight it out at 3B. That way Kieboom doesnt have the pressure to replace Rendon, and he can also play a position that's less taxing.