Lets say 4 for argument sake, the Sox record would be 48-34. They would be 6 behind the Yanks in the loss column, instead of 10, 6 GB's, and would be 2 up leading the WC.
That's how important a single game is.
When you have the lead, it is huge to finish it, and win it.
Also being 6 behind in the loss column, going into this weekend, it is still not imperative, to sweep it, you get by with a split. Sox now need to gain ground on the Yanks, even though it will be in only June 29th, and 30th.
Sox now cannot be swept. Split is not too much to be happy about, all it amounts to is 2 more games off of the schedule. 2 games less to gain ground.
Less games to play in the season, even MORE important to win them when you have the lead.
Only 80 games left, sounds like a lot, but it isn't.