The 54-year-old, now based in Australia, was at Celtic Park on Sunday to present the current squad with the Premiership trophy as they celebrated eight in a row.
There may have been a few butterflies at an emotional return. But 24 hours earlier he had what was probably an even more nerve-wracking experience - watching son Chris try to help Clyde to promotion.
The 22-year-old midfielder has been a key player for the Bully Wee this season and came up trumps again with another fine display to help Clyde overcome Annan Athletic in their play-off final second leg at Broadwood.
That ended the Bully Wee's nine-year exile in Scottish football's lowest tier - and there would have been no-one in the 2,725 crowd more delighted or proud than the former Celtic skipper.