Personally I'd drop him.
My wife has MS, and is considered to have it rather mild. With that in mind she has had to cut back to 4 days a week and realistically if we could afford it she'd drop to 3. I admire his desire to fight on, but it's a seriously debilitating/draining illness. I atruggle to see him being able to continue the workload of a professional athlete. Thing he probably hasn't learnt yet is that he will be able to find energy to get through a game, but it's the day after that will smash him.
I wish him well, but my 2 cents fwiw
30 Team, 27 Player Capped Keeper. 12F, 6D, 1G Active
Scoring - G, A, PPG/A, +/-, SHG/A, W, SO, (GA bonus's)
F - Couture, Stamkos, Neal, Vermette, M. Koivu, Kulemin, S. Koivu, Schwartz, Gerbe, Sheppard, Cizikas, Galchenyuk (Da Costa, Cousins, Sgarbossa)
D - Hedman, Ellis, Gardiner, Faulk, Irwin, Orlov (De Haan, Sproul, Finn)
G - Varlamov (JS Giguere, Allen)