Competitive, Normal, Rumble
Normal, Stormy and Night
Mannfield is one of the arenas included with the original release of Rocket League. There are 2 variants of Mannfield: Normal and Stormy. They both were included with the original release.
Mannfield was added to the Rumble playlist and gamemode in Patch 1.22 as one of the 7 initial maps, with the versions Normal and Stormy.
Mannfield (Night) was added to all playlists in Patch 1.31 as a Night version of the normal Mannfield.
Mannfield is one of the standard maps and is thus frequently used in tournaments. It featured in both the RLC Pro League and RLCS Season 1 final.
In-game screenshot of Mannfield.