Given the task definition, example input & output, solve the new input case.
In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.
Example: The car's wheel are loose.
Output: The car's wheel is loose.
The instance of are is replaced by the word is. This makes the sentence grammatically correct.

New input case for you: He actually changed the way he played in the latter part of his career when he won all those championships . 
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
He actually changed the way he played in the latter part of his career , when he won all those championships . 