There are strict rules governing when a substitute musician is allowed to play on with a Broadway orchestra. One of the rules is that in a given section, if there is a 1st time sub, all the other musicians in that section must be a regular member OR a substitute that has been designated “as good as the regular player.”
Usually a person is not designated until they have played the show quite a number of times. In my case, I’ve played the show three times and tonight I was playing in the section with a first time lead trumpet player.
Although playing with a 1st time lead trumpeter can be nerve wrecking, I took it as a compliment to my playing. All went very well.