Pricefan18 I believe it was Johnny, but it very well could've been Gene. Much like Walk Of Fame, every playing of Balance Game had Mr. Olson announcing except for the game's final. It's been over 2 decades but I believe there were a handful of shows that had Gene Wood announcing. FWIW, WinTV's comments pretty much said this game sucks & a head-scratcher.
As mentioned, the line up that was most familiar, especially in 1999 was mid-70s (1976-1977), then 1979, 1982, 1986, and 1991 Monday thru Friday. Every-so-often GSN would change it up. For instance, early in 1999 (and in 2000) the Wednesday episode was from Season 15 taped either June 9 or June 10 in 1986. Earlier that week, the Monday & Tuesday shows were swapped, with Friday holding with an early 1992 show. 3 months later, on 04/01/1999, the Thursday episode, where the focus was on Season 15 more often than not, had a Season 9 episode. To be specific, the 1981 April Fools show.
I saw somewhere that GSN aired TPIR episodes that aired in late 1992 and early 1996. Maybe the former is accurate, but I haven't seen anything Price-related that aired on GSN beyond most of Season 20 (as in episodes before the set change).
GSN has been known to go off-script just because. For good reason too, including putting on an holiday episode (Christmas, Halloween, and April Fool's as mentioned)