Hyun-Jin Ryu isn't expected to appear in an exhibition game for the Los Angeles Dodgers and Dave Roberts says it's unrealistic to believe he'll be able to appear on a Major League mound by May.

Ryu missed all of last season after having shoulder surgery in May 2015.

"He was a guy we had penciled in at the top of the rotation," Roberts said. "But you've got to adapt. Things are going to happen that we're not too excited about. But that's our reality."

Ryu threw 20 pitches in a bullpen session Monday. It was his first since Feb. 26, after which he experienced discomfort in his shoulder.