Very very sad. Blew me away when I saw it.

That is terrible news. One of the most inspirational players I've ever seen play.

Absolutely devastating.

This has been one of the hardest things I’ve ever felt from a sporting perspective, utterly devastated.

Such a horrible, horrible illness. So sad to hear.

As the OP said, floored me has this. Absolutely gutted for him and his family.

Very sad news to hear,always worried me when we played against you guys,never knew what he was going to do.

Wow - this is awful news. Such a young family he has too. Let's hope he can fight this for as long as possible

I was told about it yesterday. Gutted

I’m absolutely gutted for the lad . One of the greatest players of the modern era . Such an inspirational talented player that was a pleasure to watch except when he tormented my team on a regular basis. My thoughts , wishes and prayers go out to Rob , his family and all the Leeds fans . I don’t know what else to say , devastated !

Wigan fan

Awful news.

Thoughts with Rob and his family

So so saddened to hear this. A warrior, and heart of a lion.....

You are in all our thoughts wee man

Regards EW

I'm gutted. its honestly blown me away. sat in the canteen on site and I'm holding back the tears.

Me too, I've never met Rob but when we follow these players through their career and live the highs and lows with them you do really feel like they are family. I don't mean that to sound glib as obviously his Family and Rob himself have the hardest fight they will ever have but it's when things like this happen you sense that Rugby League really is a family as well.