The injured player was put on waivers by his team.

waivers 是名词 waiver 的复数形式。waiver 来自动词 waive（放弃、免除），指"放弃某项权利或要求的正式声明"。在体育领域特指"豁免名单"，即球队暂时放弃对某位球员的签约权，其他球队可以在此期间认领该球员。