The Red Sox have made their first trade of the offseason.
The team announced it has acquired minor-league infielder Christian Koss from the Rockies in exchange for Yoan Aybar, a pitcher who hasn't performed above Single-A.
Aybar, who was originally signed as an outfielder, was on the 40-man roster, leaving the Red Sox with an open spot heading into the upcoming Rule 5 Draft.
The 22-year-old was a 12th-round in the 2019 MLB Draft, having played at University of California-Irvine. At Grand Junction in the Rookie League he hit .332 with a 1.052 OPS while making the 2019 Pioneer League All-Star team. He has played second and third base along with shortstop.
Aybar is an intriguing arm, possessing a fastball that sits in the mid-90's while averaging 11.6 strikeouts per nine innings. He was moved to pitcher in 2018, being added to the 40-man roster after that season.