Video: Ugly-Looking Injury Suffered By Red Sox First Baseman Triston Casas

May 02, 2025

It looked bad... very bad. Boston Red Sox first baseman Triston Casas suffered a scary-looking knee injury Friday night, enough for manager Alex Cora to call it "a significant injury" even before any tests have been run.

When Casas planted his right foot on the first base bag trying to run out an infield chopper, his left foot and knee buckled and he immediately began clutching his left leg and writhing in pain on the field. He had to be stretchered off the field. 

Triston Casas knee injury is significant

Sports doctor Jesse Morse did what he could from viewing the play to explain what he believes happened. 

"This is a traditional mechanism of injury for a PCL (Posterior Cruciate Ligament) sprain," wrote Dr. Morse. But he also added that it could also be something more serious, like an ACL tear or a 'meniscal tear.'"

The doctor added that since Casas was carted off the field, that would speak to the severity of the injury.

Casas, just 25, was one of the Red Sox' top prospects just a couple of years ago, and began his major league career in 2023 with an impressive 24 home run season with an .856 OPS. But he struggled to stay healthy last season and was limited to just 63 games.

He was hoping to bounce back this to reclaim his promising player status, but he was batting just .184 with a .585 OPS to this point in the season, and now will be out of action for quite some time.

There's a chance that the Red Sox could call up the top prospect in baseball, outfielder Roman Anthony, as a result of this turn of events. Currently, Rafael Devers is DHing, but he could potentially move over to first base to replace Casas, and Anthony, if he's called up, and the other outfielders could rotate through the DH spot. 
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