How does that do anything for boston?

Walk me through how this deal benefits Boston

I was trying to move a struggling young center for a change of scenery. Can’t imagine Fredricks value is going to be significant given the year he had. Boston has better options in the pipeline who have risen above him. Larsson is a depth veteran center who can play a bottom line role and brings physicality while Fredrick is younger with more upside which is why I threw in the pick.