Yes. There is, in my opinion, little or no advantage to this staying on aka blasting and cruising or self prescribed TRT (as opposed to that scripted by a doc).
How old is he? How long has he been training and is he still lifting? These will factor into how well he'll recover.
In fact here's a suggestion: When I compete I do a cycle. At the end of my cycle I go and win (as in the last few times anyway ha ha). Now I know I won't be quite so strong 'off' as 'on'. And my body will need as respite from the competitive training so I deliberately ease back to 60-70% of my usual weights.
Those guys who stay on hate not being as strong off so go back on etc etc. But if they eased back on the weights anyway and worked slowly back up without steroids it wouldn't fuck with their head and their egos quite so much.