My initials thought was sceptisism as he wasn't even in the betting when I last checked, but nows he's 10/1.
http://www.oddschecker.com/football/football-specials/southampton-specials/next-permanent-manager
If what you say is true then that'd be best coup since Keegan.
Edit: for some reason the southampton specials have disapeared, but there's still a MON page.
http://www.oddschecker.com/football/football-specials/martin-oneill-specials/next-job