FYI the wider rectangular area is already named Mapson & Timmins Oval: <https://osm.org/way/596673851>. Photo of sign confirming this name: https://commons.wikimedia.org/wiki/File:Muckleford_Oval.jpg

I’m a bit suspicious that South Muckleford Cricket Ground may be a googlism though. On Vicmap it’s called Muckleford Recreation Reserve.