Question

Which pronoun best completes the sentence? No other players in the league scored as well as __________ .
a. us
b. they
c. their
d. them

Answer 1

The pronoun which best completes the sentence is them.
No other players in the league scored as well as them.
You need to use an object pronoun (them), and us and they are subject pronouns, whereas their is possessive. 

Answer 2

the answer is d them