YOU SAID:
He asked me to join his team
INTO JAPANESE
彼は私にチームに加わるよう頼んだ
BACK INTO ENGLISH
He asked me to join the team.
INTO JAPANESE
彼は私にチームに参加するよう頼みました。
BACK INTO ENGLISH
He asked me to join the team.
That didn't even make that much sense in English.