He plays a lot of tennis.

[8769]

I think #1, below, is good English.
1. He used to play tennis a lot when he was a college student.

How about #2, below?Is it good English, too?
2. He used to play a lot of tennis when he was a college student.

 

[Shadowcat12]

They are both understandable english, but i feel that #2 sounds better. The second phrase about college works better in that one.