That was NOT an early achievement. He had just 31 more RBI in 1972, the last season he played. He died on New Years Eve that year, delivering earthquake relief to Nicaragua, when his plane crashed into the ocean after taking off from San Juan, Puerto Rico.
He finished with 1,305 RBI.
Now for the bigger mistake. Willie Stargell is the Pirates career leader in RBI with 1,540.
Clemente is still the career leader in at bats, singles, hits and total bases and is tied with Honus Wagner for games played.