Wendy

Welcome to the club that nobody wants to join. I liked your subject line; mine would have been Dad/Husband/Gov't Ninja.
Of course now you want to add a new category: Cancer Survivor.
In addition to the advice here, please INSIST ON A TSH blood test now to get your healthy level of thyroid hormone. Without that normal baseline, you will find it very hard to get oncology specialists to help you after treatment since the lab values for TSH are still using 20th century levels instead of the research that last twenty years. As an athlete you will want the same TSH level after radiation & chemo that you had before. Trust me on this, it is a very big deal and it is a very simple easy blood test.

As the resident contrarian on OCF, I support your trying to just keep swallowing thru treatment. PEGs are a hot button issue here since almost all need to believe in our doctors and some radiologists insist on tubes and others (like my CCC) discourage them. So when someone challenges "our" doctor's opinions, it has gotten feisty here in the past. For what it's worth, Like yourself, I was bound and determined not to get a feeding tube and I didn't the first time around. For some of us, the self image of strength and health as well an indomitable spirit just are not compatible with getting a feeding tube. It feels like we are giving in to the cancer. But we are a distinct minority. For the majority of OCF posters, a feeding tube was a Godsend which did not impact their strength or spirit, it just was accepted as part of TX, not what they wanted but needed. .
My advice is to try it, you can always get one popped in if you change your mind. There's no shame in changing your mind.

I'd keep exercising as long as possible but just eat a lot more and put on some extra weight. Even those with PEGs lost weight. Yes, pig out on high calories - you will be glad you did once TX starts and swallowing becomes painful.

Last but not least, if you can do your job from home on a computer, you should be able to work. Travel though will be out of the question with the radiation schedule so start exploring Skype and Video conferencing and other options now.

Oh, and I hope the original pathology report is wrong and that you don't have cancer at all. We do not need nor do we want any more new members in our club.
Charm