Police are appealing to the public to help them piece together how Peter Wilkinson sustained the injury.
The 53-year-old woke after a night out with no recollection of what had happened.
He remembers leaving Wings Bar, going to the Strand pub, before walking along Exeter Road in Exmouth.
It happened in the early hours of Saturday August 12th.
Hundreds sign petition calling for village zebra crossing
Calls for Starcross crossing
Car parking fees to go up on Dartmoor
There will be a 20p increase for 24 hours.
Tens of millions to be invested in Devon's buses
Local leaders will decided how money is spent
Fawlty Towers: The Play - REVIEW
Chaotic tribute act to renowned series
Lib Dems hold Exmouth seat in by-election
Fran McElhone wins the Halsdon seat
