The one thing the Red Sox know about their situation at first base is that Triston Casas won’t play for the rest of the season. Casas ruptured his left patellar tendon on Friday and will soon have surgery that will require an extensive rehab.

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

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