The Washington Nationals are in an enviable position this spring: They have few unknowns. The lineup is complete. The starting rotation has been set since December. Players are entrenched at every position, save for a catcher returning from knee injury. Even the bench figures to be the same.

Then, there’s Henry Rodriguez.

Of all the known commodities on this team, Rodriguez is the enigma. The flame-throwing right-handed reliever can be extreme at either end of the spectrum, otherworldly stuff or mind-boggling wildness.

Over the past month since players reported, the exact composition of the group with the most turnover from last season, the bullpen, has come into clearer focus. The Nationals expect to break camp with a bullpen that contains one left-hander and a lot of right-handers, and they believe Rodriguez, flaws and all, is a part of that. They think he can be better now that the elbow pain that long bothered him is gone thanks to surgery. They know that if the 26-year-old doesn’t make the team out of camp they lose him.