Ready fire aim.... Care to quote your source for that?

Here, I'll help you out:

Q. The press release mentions 767s as aircraft that are being replaced. I thought this was for narrowbody domestic fleet retirements?

A. Because of its range and size, the 737-900ER can be deployed to replace several aircraft types, ranging from the smaller 757s and Airbus A320s as well as larger domestic 767-300s. The new airplanes are not intended to be one-for-one replacements for a single aircraft type.