Box score game results question

What does the number next to the relult of each play represent? I know that it ranges 1-7. I ASSUME it has to do with what column the result happened in. What does 7 represent if that's the case?
http://forum-365.strat-o-matic.com/archivesn/
http://forum-365.strat-o-matic.com/archivesn/viewtopic.php?f=12&t=305154