Last year, to its detriment, Boston put together a patchwork platoon to replace Casas. This time around, the franchise needs to act fast.

Casas suffered the injury while running to first after hitting a slow roller up the first-base line in the second inning of Boston's 6-1 win over the Minnesota Twins on Friday. He fell awkwardly and was carted off the field before he was eventually hospitalized.

The Red Sox announced on Sunday that Triston Casas underwent surgery to repair a torn patellar tendon at Mass. General Hospital.