How’d he do in 2017?
As you could imagine, it was an adjustment for Rosario stepping up against major league pitching. He struck out 10 times in his first six starts. He didn’t have a multi-hit game until his 10th start at Philadelphia. For the season, Rosario homered four times and drove in 10 runs. He also stole seven bases and scored 16 runs.
The biggest issue Rosario had was his chase rate. He had a swing percentage of 45.5 on pitches outside the strike zone. That rate would have been second worst among all qualified hitters, trailing only Corey Dickerson.
Defensively, Rosario flashed his brilliance and athleticism in the field. Overall, he wound up with a .965 fielding percentage, which would have put him 16th among all shortstops according to Fangraphs. We’ve also seen the ground he can cover. Rosario is a rangy athlete with natural ability. Statistically, Rosario grades out slightly better than average and he hasn’t played a full season yet. There’s still room for improvement.