Boston Red Sox first baseman Triston Casas suffered a ruptured tendon in his left knee and is out for the remainder of the season, the team said on Saturday.

Triston Casas wasn't hitting well at all, but he still may have been the one player the Boston Red Sox weren't prepared to lose. The Red Sox truly didn't have other first basemen on the roster behind Casas.

Casas was removed in the bottom of the second inning after suffering what manager Alex Cora described as a “significant (left) knee injury.”