teammate

open teammate 空當處的隊友

Teammate down 隊友被誤殺

His Teammate 他隊友 ^[1] 

柯林斯英漢雙解大詞典

teammate /ˈtiːmmeɪt/ (also team-mate) ( teammates )

1.N-COUNT In a game or sport, your teammates are the other members of your team. 隊友

例：

He was always a solid player, a hard worker, a great example to his teammates.

他一直是實力派運動員，勤奮刻苦，是隊友的好榜樣。 ^[1]