It take placed in Lisfannon Park, Derry on Tuesday just after 9.30pm.
The 33-year-old was scooted to hospital where his injuries were described as serious but not life minatory.
Detective Sergeant Phelan said: “We believe four masked men were tangled in this brutal and horrific attack and we would ask for the community’s help in associating those individuals.
“Anyone with information can contact detectives on 101 quoting referral number 1346 08/08/17. Alternatively the Crimestoppers charity can be contacted anonymously on 0800 555 111.”