What are these numbers?

[ipitch]

What do these pairs of numbers represent? This probably won't be too hard.

0,4
1,3
2,8
3,7
4,10
5,10
6,11
7,13
8,13
9,16
10,16
11,16
12,19
13,18
14,20
15,22
16,23
17,20
18,23
19,26
20,21
21,23
22,22
23,23
24,24
25,23
26,26
27,26
28,25
29,30
31,22

EDIT: OK, no guesses yet, so maybe it's harder than I thought. I added 10 more pairs of numbers onto the end of the list, which should make it a little bit easier. I'll add some more pairs to the list on Friday if no one gets it by then. After that, I won't be able to add any more pairs to the list (that's a hint).

EDIT: The list is now complete. Someone has to know this now. Any guesses?

[ipitch]

Another hint: Andy Hawkins

[Trivia Guy]

After seeing your hint, I guess that the second column is the most runs scored in a game by a team in which they got the number of hits in the first column.

[ipitch]

After seeing your hint, I guess that the second column in the most runs scored in a game by a team in which they got the number of hits in the first column.

Correct! It's kind of strange how the number of runs sometimes goes down as the number of hits goes up.

[Utter Chaos]

I take it this is only since 1957, correct?

[ipitch]

I take it this is only since 1957, correct?

Yeah, I forgot to mention that. Thanks.