The only contestants still tossing gomes were Brad and he.

个人认为 这是倒装句型
正确的句子结构是:"Brad and he were the only contestants still tossing gomes "

因为he不是宾语，所以用"he",不用"him"。语法书没错,Brad and he在句中作主语补语；因为“主系表”结构也可以看作是“主语+谓语+主语补语”。:)