I asked where's Mick Rogers? Well apparently he has Epstein-Barr virus. Now that can take many forms, including 'glandular fever' or mononucleosis and has been linked to Chronic Fatigue Syndrome. I think Cunego had it just after his break through year and has been slowly regaining the form he used to have... OTOH just about everyone has it at some point in their lives and they get by...
Personally it recurred every time I got back on the bike... it took about a year to get over it and I never got back the form I had prior... but as I say, Cunego is coming back strong and it's a very common virus. But I would guess Mick is out for the season...