reserve clause

1. Refusing to let the Cardinals trade him at the end of the 1969 season, Flood challenged the MLB about the reserve clause, which stipulated that a team owns a player for life until their release or trade.
   在1969年赛季结束的时候，弗兰德拒绝让红雀对他进行交易，他向MLB的保留条款发起挑战（保留条款规定球队终生拥有球员直至将其释放或交易）。
2. Also, because the reserve clause in players'contracts prohibited free agency, rosters were much more stable in Auerbach's halycon days.
   当然，由球员合同中的保留条款禁止自由转会，奥尔巴赫执教时期的球队花名册非常稳定。

noun

1. a clause that used to be part of the contract with a professional athlete extending the contract for a year beyond its expiration
   1. the reserve clause was used to bind players to a particular ball club