Five a side football centre Goals Doncaster is calling for the public's help in identifying the man who was spotted on camera wheeling the lawnmower across the centre's car park in Worcester Avenue, Wheatley.
The centre has dubbed him "The Lawnmower Man" after the 1992 American science fiction horror film of the same name about a simple-minded gardener.
A spokesman said the matter had been refrerred to South Yorkshire Police.
A post on the venue's Facebook page read: "Keep your eyes peeled, he has just had off with our lawnmower - any help on this would be much appreciated - cheeky reward too."
Anyone with information should contact 01302 965220.