That's an interesting stat (56-3, after 6 when leading) given that Jansen himself has lost 5 games . That means the Sox trailed after 6 at least 2 times, tied or regained the lead, then Kenley blew it. There must be a few others on the staff who did the same.
Anyway, the eye test indicates that the Sox tend to hit better late in the game , often quiet early.