Maybe with the additional baserunner in extra innings things have changed some but winning one-run games was always thought to be the result of random chance and not a sustainable skill.
Wouldn't a good offense be just as likely to help? For example, if you are down by a run heading into the 9th on the road, a good offense is your only chance to turn a 1 run loss into a 1 run win.
And I can think of scenarios where a bad bullpen could actually help your record in 1 run games as well. Say you are up by 4 runs after your starter exits the game. Insert a couple of s***** relievers to close it out who give up some runs and it turns that 4 run win into a 1 run win.
So I'm pretty sure they just have a horseshoe stuck up their ass. Hopefully it falls out this series.