it sounds like stress.
It sounds more serious than Vermeil-style burnout. There's three possibilities.
1) It really is what they are saying and he's going to get himself healthy and relaxed, if possible.
2) He's angling for a new contract/better job and this is his way of positioning himself for that.
3) He found a golf club had shattered his back window and decided to take the hint, citing the "spend time with my family" dodge.
For now, I'm accepting the first as the most plausible answer but, with what we've seen the past five weeks, you can't rule out the other possibilities.