Conversation so far:
How did Mickey do Mickey Mantle's rookie season?
he was not able to find the power he once had in the lower minors.
Did he improve?
Mantle immediately broke out of his slump, going on to hit .361 with 11 homers and 50 RBIs during his stay in Kansas City.
Was Kansas City his first team?
After an impressive spring training, Yankees manager Casey Stengel decided to promote Mantle to the majors.
What position did he play?
right fielder.

Question: What else is important to know about his rookie year?
Self-contained rewrite: What else is important to know about Mickey Mantle besides the rookie year?