So Bill Johnston had one of the best seasons ever then did he?
People are so profoundly wrong about this issue that I will now deploy bold text to help them understand.
The reason why people get so muddled about what a batting average means is that they think it is some kind of measure of runs per innings. It isn't. If that's what you're looking to it to measure, then not outs would indeed "inflate" your average. What the average signifies is how many runs you score per dismissal. End of story.
(Well, nearly end of story, because I would add that (and admittedly this is slightly more controversial) how many runs you score per dismissal is about as good a measure of how good a batsman is there is, provided you keep in mind the sample size you're dealing with. And the sample size is measured not by the number of times that you're not out, but by the number of times you are out.)
Anyway so Bill Johnton scored 102 for once out in 17 innings on the 1953 Aussie tour of England. Does the fact that he averaged 102 mean that he had one of the best seasons ever? Well I would respond as follows.
1. No. By scoring 102 for once out he averaged 102. But the sample size is still one. Just as if he'd scored a fluky hundred - as tailenders sometimes do - in the only innings he played.
2. That said, batting on 17 occasions and only being out once is in fact an incredible statistical achievement. To score 102 runs, while having to start batting 17 times, is much harder than to do it all in one go, when for most of the time you've got your eye in. Brian Lara used to say something like "the first 15 minutes belong to the bowler; after that you cash in". Well a tailender who builds up an average through short unbeaten knocks is batting in that difficult first 15 minutes for a disproportionately high amount of time. So if someone scores 102 runs over 17 innings, and to be defeated only once in the course of amassing those 102 runs, well in my book that's an awesome achievement.
3. Sadly, Johnston's case is in fact a little misleading because, as his average mounted, his team-mates and opponents started to conspire in allowing him not to be dismissed.