I would have thought it impossible, or nearly so, which I suppose it really is. Nearly so. A decade of that? You can't have many 2 loss seasons.
Just staying with a 12 game regular season, it's tough, as 11-1 and 10-2 gets you 21-3, which doesn't cut it.
11-1, 11-1, 10-2 would be 32-4, which also is only .889.