Red Sox Acquire Top-30 Prospect Christian Koss, Swap of Prospects with Colorado


The Major League Baseball offseason is fully underway, and now that the non-tender deadline has officially passed, the Red Sox can finally be active.  The Red Sox made a minor trade on Thursday sending left-handed pitching prospect to the Colorado Rockies in exchange for minor league infielder Christian Koss.

Photo courtesy of

With this trade, the Red Sox 40-man roster is now set at 39, leaving them room to add a player during the upcoming Rule-5 Draft. 

The trade of Koss and Aybar in a swap of Top-30 prospects and it gives the Red Sox another young infielder with offensive upside.  Koss, 22, was ranked No. 29 in the Rockies system by Baseball America.  He is listed at 6-foot-1, 182 pounds and was drafted in the 12th round in the 2019 MLB Draft. 

Koss batted .332 with 11 home runs, 11 doubles, four triples and 51 RBI’s with 10 stolen bases in 53 games for the Grand Junction Rockies.  He had a .447 on-base percentage, .605 slugging percentage and a 1.052 OPS. 

Koss attended the UC-Irvine where in 146 games in the NCAA, he hit six home runs, knocked in 67 runs while hitting .270.  He had a .340 OBP, .385 slugging percentage and a .730 OPS.  His best season was in 2019 for UC Irvine, where he hit .307, hit five home runs and knocked in 30 runss.

Koss spent time playing in the Cape Cod League for the Yarmouth-Dennis Red Sox.  During his time with the Y-D Red Sox he played 71 games where he batted .284 batting average with two home runs and 28 RBI’s. 

Courtesy of Jean Truth/La Vida Baseball
     Photo courtesy of Jean Fruth / La Vida Baseball

The new Red Sox prospect is capable of playing every infield position with the exception of first base.  If you have looked at how the Rays have built some of their rosters over the years, they value players who can be versatile all over the diamond.  Chaim Bloom adds another versatile fielder to his system with the potential to have a little pop in his bat. 

Following the conclusion of the 2019 season, Baseball America wrote about Koss saying, “He profiles best as a utility infielder, an average defender at all three positions but without the range to play shortstop on a regular basis.  His average arm strength plays up because of how quickly he gets rid of the ball.  What impressed opposing managers the most was the energy he showed on the field, with one observer calling him an old school-type of player.”

Koss will likely project to start in Salem next season for the Red Sox.  The Red Sox are continuing to stockpile young talented players to their system as Bloom reloads the minors.  The other thing to not discount in this deal was trading Aybar, who was recently added to the 40-man roster.  There was potential that had he been left exposed another club could have selected him in the upcoming Rule 5 Draft. 

As the Red Sox continue to rebuild or re-tool, whichever you want to call it, I would expect more moves like this from Bloom.  The Red Sox are in good hands and it feels like they have someone that is truly building something again in Boston and he's not just throwing money to fix the problems. 

Follow Chris on Twitter @chrishenrique

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Boston Sports Syndicate: Red Sox Acquire Top-30 Prospect Christian Koss, Swap of Prospects with Colorado
Red Sox Acquire Top-30 Prospect Christian Koss, Swap of Prospects with Colorado
Boston Sports Syndicate
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