Some of these are impossible to break just because the game has changed so much
511 wins never ( likely 300 or so losses too ?), You just can't get that number of decisions in today's game, even a 300 game career winner is unlikely ever again !
I'm curious how BAS picked 1941 for the cutoff year ?
Cal's 2632 is a lock, no player would ever get the chance again, managers are going to rest you no matter what.
Some that are highly unlikely to be broken but not entirely impossible...
Batting .400
4,192 hits
Records like most this, most RBIs, homeruns ,wins,etc. In a season are pretty safe and not going to be broken.
Mr. O for 53 is pretty safe, too. It takes a perfect storm to accomplish that. A team with no prayer of even a wildcard, huge contract, no minor league options, untradeable, at this point he's probably even a draw and people will come to witness this home or away !
Wilt and 20k broads is almost certainly BS, probably closer to 2k
100 points in NBA could be done given a lot of things going just right