As inspired by this post:
1. NBA on NBC ("Roundball Rock")
2. NFL on Fox
3. College basketball on CBS
4. NBC Olympics
5 (tied). Sunday Night Football
5 (tied). Monday Night Football
7. Hockey Night In Canada ("The Hockey Theme")
8. College Football on CBS
9. NBA on TNT
10. NHL on ESPN
11. NFL on CBS (mid-'90s)
12. MLB on ESPN
13. NHL on NBC
14. NBA on ABC/ESPN
15. MLB on Fox
16. NFL on CBS (current)
[...]
736. NHL on ESPN2
737. The Masters
738.
739. Whatever hot garbage NBC used for the NFL in the pre-SNF days