In hockey:
1. Gordie Howe playing NHL hockey in 5 different decades
2. Gordie Howe playing a full NHL-season at the age of 52 (and scoring at a .5 PPG pace)
3. Wayne Gretzky's 215 points in one NHL season
4. Tony Hand's 4,000-something points in the British league
5. Peter Forsberg's 31 points in the 92/93 World Junior Championship*
6. Markus Naslund's 13 goals in the 92/93 World Junior Championship*
7. Martin Brodeur's 110 NHL shutouts
8. Henrik Lundqvist's five straight (and counting) 30-win season to begin an NHL goaltending career
*In 7 games, and yes, that means Forsberg almost scored at a 4.5 PPG pace against the best junior players in the world!
I'm sure there are more, but those are the ones I can think of on the top of my head.
🙂 I will reserve myself to take away #3, 5 and 6 if we have another high-scoring era, but I doubt it since the goalies are so much better nowadays.