Is he sick?

No, he is.

I believe its Colon cancer from what I've read.

I see him in NCIS and its clear he is not well.

He speaks now like there is cotton in his mouth I hope he gets better whatever it is

Yes, he looks sick and talks strange. All the best for him !

I was just watching tonight's episode and noticed his speech seems impaired and when he was taking a drink they showed him put the glass to his lips and you could hear a slurping sound for just a second and it cut to Hetty like he could be having difficulty swallowing. I pray for him that they caught it in time. Just lost my mom last year from the same thing.

I could barely understand him tonight. Definitely something wrong..

I have seen in other posts where he has apparently had a stroke in October or so. At least he is back to work so that's some good news from it.

It seems to be getting gradually worse,I noticed a little slurring a few episodes back but now you can hardly understand him.

I knew someone who went completely deaf even though most of her life she could hear and just could remember how to talk but couldn't tell how she sounded muscle memory kinda thing, He almost sounds like that, I doubt its that or at least only that but I hope in the long run he'll be ok or something that can be managed without loss of comfort of life