The Nationals announced today that they’ve traded minor league right-hander Ramses Rosario to the Red Sox in exchange for the No. 66 international bonus slot. That slot is valued at $327,700, per Baseball America.
Rosario, 19, was signed by the Nats in the 2012-13 international signing period and has worked exclusively in the Dominican Summer League from 2013-15. He’s posted a combined 4.11 ERA in 72 1/3 innings across 34 games (31 relief appearances) in that time, averaging 6.2 K/9 against 3.4 BB/9. Rosario did not rank among Washington’s top prospects per Baseball America, MLB.