presiding arbitrator

基本解释

The third arbitrator shall be the presiding arbitrator.
第三名仲裁員是首蓆仲裁員。
lib.ncu.edu.cn
The Claimant and the Respondent shall jointly appoint or jointly entrust the Chairman to appoint a third arbitrator as the presiding arbitrator.
申請人和被申請人還應共同選定或者共同委托仲裁委員會主任指定第三名仲裁員擔任首蓆仲裁員。
If an opinion of the majority arbitrators can not be constituted at the tribunal, the award shall be given according to the opinion of the presiding arbitrator.
仲裁庭不能形成多數意見時，裁決應儅按照首蓆仲裁員的意見作出。

The arbitrator did the players no favor when he spoke out on other contracts (naming players specifically), which could taint the decision of any arbitrator who ended up presiding over hearings for guys like Luongo and Hossa, who are said to already be under investigation for their previously approved contracts.
FORBES: The NHL: Where No Contract Is Safe