I won't speculate on the answer, but I'll give you the evidence. In the last eighty years, a player has increased his home run totals by 30 from one season to the next 16 times. Dave Johnson holds the record, going from 5 dingers in 1972 to 43 the next season. If it all evened out, there would be two occurrences of a 30+ increase every ten years. However, here are the actual numbers:
- 1925-1934 → 2
- 1935-1944 → 0
- 1945-1954 → 1
- 1955-1964 → 0
- 1965-1974 → 2
- 1975-1984 → 0
- 1985-1994 → 1
- 1995-2004 → 10