.400 BA for Batters and Perfect Game for Pitchers.
The Arizona Diamondbacks had the worst record in baseball in 2004: 51-111 (.315) In the American League, the Kansas City Royals had the worst record: 58-104 (.358)
Pete Rose currently hold the record with 3,562.
In 2004, Ichiro Suzuki hit a record 225 singles.
That would be the 1899 Cleveland Spiders (National League) whose record was 20-134.
5
The rarest occurrence in baseball is a perfect game, where a pitcher faces the minimum 27 batters and no opposing player reaches base.
Look up Dale Hawkins Oh! Suzy-Q
Throwing a no-hitter is called the rarest thing in baseball, but it actually isn't: striking out 20 batters in a nine-inning game has only been done twice.
I not sure if it is classified as the "rarest" as far as number of copies but I can say that I think the most expensive record is a copy of John Lennon's "Imagine" which was signed by John Lennon. What is so significant about this signed copy...? This copy was signed just hours before he was shot and he signed it for the man who shot him. I forget his name off the top of my head.
mew2 is the rarest
rarest eye color is GREEN
Well the rarest jem is Emerald and the 2nd rarest is Diamonds 💎
i am the most rarest woodpeckerdidn't you know that
The temperate forest is the rarest biome.
Pikman or Pokemon The Rarest is mewtwo
The rarest Pokemon is Dialga
no the spider is not the rarest sillyband