The Yankees traded RHP Ronald Herrera to the Rangers as well as RHP Nick Rumbelow to the Mariners to clear space on their 40-man roster.
Herrera was traded to the Rangers in exchange for 21-year-old LHP Reiver Sanmartin. Sanmartin spent the 2017 season in A-ball where he threw 66 innings (11 starts, three relief appearances) with a 2.41 ERA. Sanmartin currently sits upper 80s with his fastball, and has a decent changeup and slider to go along with it.
Since he signed with the Rangers as a 19-year-old in 2015, Sanmartin must wait another year before he is eligible to join the 40-man roster.
Rumbelow was sent to Seattle for LHP J.P. Sears and RHP Juan Then. Sears spent time in low A-ball last season totaling 142 strikeouts in 95.1 innings. The 17-year-old Then signed with the Mariners for $77,000 out of the Dominican Republic. At his young age, Then brings the heat with a 90-94 mph fastball.
Herrera, 22, was a force in the Yankees' farm system last season. He owned a 1.91 ERA in 75 1/3 innings (14 starts) between Double-A Trenton and Triple-A Scranton/Wilkes-Barres. Rumbelow went 5-1 with a 0.62 ERA in 29 innings with Triple-A Scranton/Wilkes-Barre after undergoing Tommy John surgery in 2016.
The Yankees now have five open spots on their roster as they will try to protect players ahead of the Rule 5 Draft on Monday night.