The Red Sox have acquired infield prospect Christian Koss from the Rockies in exchange for left-handed pitching prospect Yoan Aybar. The club made the trade official earlier Thursday evening.
Koss, who turns 23 in January, was selected by Colorado in the 12th round of the 2019 amateur draft out of the University of California, Irvine.
In 53 games with rookie-level Grand Junction of the Pioneer League last year, the Riverside native posted an impressive .322/.447/.605 slash line (172 wRC+) to go along with 11 home runs and 51 RBI over 238 plate appearances.
Named a mid and post-season Pioneer League All-Star thanks to his efforts, Koss opened the 2020 campaign regarded by Baseball America as the Rockies’ No. 29 prospect.
Capable of playing every infield position besides first base at the moment, the right-handed hitting, right-handed throwing Koss is listed at 6-foot-1 and 182 lbs.
Koss is Rule 5 eligible next winter, so the 2021 season will prove to be an important one for him regardless of where he begins the year, which will likely be High-A Salem.
As for Aybar, the now-former Sox prospect was added to Boston’s 40-man roster last November, yet he was the only member of the 40-man roster to not be included in the club’s 60-man player pool this past season.
Originally signed as an outfielder out of the Dominican Republic in 2013, the stout southpaw converted into a pitcher full-time in 2018, most recently posting a 4.61 ERA over 44 relief appearances and 56 2/3 innings pitched between Low-A Greenville and High-A Salem last year.
With Aybar being traded to another organization, the Red Sox’ 40-man roster is currently down to 39 players, with plenty more moves to come as the offseason continues.