He was ejected for unsporting conduct.

他因为不符合运动员道德的行为被驱逐。

《柯林斯英汉双解大词典》

The Ghana international faces a UEFA charge of gross unsporting conduct following a challenge on Liverpool's Dietmar Hamann during their recent Champions League game at Stamford Bridge.

这名加纳球员将面对欧足联对他可能存在的缺乏体育道德行为的控诉，来源是最近在斯坦福桥与利物浦的冠军联赛比赛中对哈曼的犯规。

youdao

Two yellow cards in 11 seconds, both for unsporting conduct: records on this are patchy, but it's likely Di Maria made history of the dubious kind on Saturday night.

WSJ: Angel Di Maria's Delay Tactics Leave Real Madrid Seeing Yellow��Gabriele Marcotti