Hi, welcome to OSM and thanks for the edits! A comment on this change - I see your point, but within OSM the norm for sports centre is a larger facility, and pitch is the norm for these features to group them with other sport activity surfaces (it's a specific example on the wiki at https://wiki.openstreetmap.org/wiki/Tag:leisure%3Dpitch). I'd recommend changing it back, to be consistent with the others in Seattle (and elsewhere).