が負傷した

was injured

→ が
phrase Uncommon #19,205
was injured が marks the person or people who were injured as the subject.
JA: 兄が負傷した。
EN: My older brother was injured.

その事故で息子が負傷したという知らせは、彼女には大きなショックであった。

The news that her son had been injured in the accident came as a great shock to her.

その事故でその電車の乗客数人が負傷した。

Several passengers on the train were injured in the accident.

大勢の仲間が負傷した

Many of my comrades were injured.

— カンフーハッスル (2004)

その事故で多くの乗客が負傷した。

Many passengers were injured in the accident.

その事故でかなり多くの人たちが負傷した。

Quite a lot of people were injured in the accident.

アリョーシャが負傷した!

Alyosha has been injured!

— コーカサスの虜 (1996)

大尉が負傷した

The captain was wounded.

— 続・夕陽のガンマン (1966)