Replays showed Casas hitting first base hard with his right foot then tripping over the foot of first baseman Ty France.

Boston Red Sox first baseman Triston Casas was placed on the 10-day injured list with a ruptured left patellar tendon on ...

On Saturday, the Boston Red Sox announced first baseman Triston Casas was being placed on the 10-day Injured List with a ...

Boston Red Sox first baseman Triston Casas suffered a ruptured tendon in his left knee and is out for the remainder of the ...

Triston Casas suffered the injury when he beat a throw to first in Friday's game, getting stretchered off the field afterward ...

Boston Red Sox first baseman Triston Casas suffered a ruptured tendon in his left knee and is out for the remainder of the ...

It turns out the injury that Red Sox first baseman Triston Casas suffered while stumbling over the first-base bag in Friday ...