Worked in the front line of adjudgement for many years. Judged a lot of important and difficult intellectual property and bargaining cases which carried weight as a chief umpire.

多年来在审判一线从事商事和知识产权审判工作，主审和参与审理了大量的重大疑难和有影响的商事和知识产权案件。

youdao

"There's a lot of common sense and good judgment we're looking for, and it's not easy to find, " says Rich Kaufman, former professional chair umpire, current director of officials for the U.S. Tennis Association (USTA) and chief umpire at the U.S. Open.

FORBES: How To Become A Chair Umpire

Umpire crew chief Tim Welke indicated that he didn't foresee a scenario in which Maddon would be disciplined.

NPR: Rangers Open Series Against Rays With 5-4 Victory

But crew chief Jeff Kellogg, who was the second base umpire, felt he had a better view of the play than Fairchild.

WSJ: With Jeter looking on, Cano leads Yanks over Jays