Born: January 30, 1999
Height: 6’2″
Weight: 185
Bats: Right
Throws: Right
Signed: Int’l Free Agent, 2016, Chicago White Sox
How Acquired: Trade (from White Sox for Ivan Nova)
Country: Dominican Republic
Agent: N/A


Rosario throws a fastball that ranges from 86-91, or 88-92, touching 93 or 94, depending on your source.  By the end of the 2019 season, he was throwing 93 mph, with a slider and curve.  He’s shown good control for his age and experience level.  The Pirates acquired him, along with some international slot money, for Ivan Nova.

DSL:  1-6-0, 7.20 ERA, 2.06 WHIP, 35.0 IP, 6.2 BB/9, 6.7 K/9

Rosario appeared mainly as a starter in his debut, although he didn’t throw a lot of innings typically.  He struggled across the board.

DSL:  4-2-0, 2.26 ERA, 1.14 WHIP, 71.2 IP, 3.3 BB/9, 8.0 K/9

The Sox sent Rosario back to the DSL and he made considerable progress over 14 starts.  Opponents had just a .562 OPS against him.

DSL: 0-2-0, 1.82 ERA, 0.91 WHIP, 29.2 IP, 1.2 BB/9, 11.8 K/9
R:  1-2-0, 3.42 ERA, 1.37 WHIP, 26.1 IP, 2.7 BB, 10.6 K/9

Despite his progress the previous season, Chicago initially sent Rosario back to the DSL for a third season.  He continued to make progress there, with a very high K rate.  He eventually moved up to the Arizona League for six games, four of them starts.  He had more trouble there, but continued to put up very good walk and K rates.

R+:  3-0-1, 2.87 ERA, 0.99 WHIP, 31.1 IP, 1.1 BB/9, 9.5 K/9

Rosario pitched in relief for Bristol, putting up very strong walk and K rates.  He was extremely tough on right-handed hitters, holding them to a .554 OPS.  Left-handed hitters had a .731 figure.

Rosario could get a shot at full season ball in 2020.

2020: Minor League Contract
Signing Bonus: N/A
MiLB Debut: 2016
MLB Debut: N/A
MiLB FA Eligible: 2022
MLB FA Eligible: N/A
Rule 5 Eligible: 2019
Added to 40-Man: N/A
Options Remaining: 3
MLB Service Time: 0.000
February 29, 2016: Signed by the Chicago White Sox as an international free agent.
December 11, 2018: Traded by the Chicago White Sox with $500,000 in international slot money to the Pittsburgh Pirates for Ivan Nova.