DID A GOOGLE search and searched other forums (TO##W, EO$$G, CAPPERS((MALL). IMMELMAN LISTED in list many golfers with field bet included. BOOK NOT SPECIFICLY listed though. Sportsbook.com and bodog DID list TREVOR though.
When I used to mod I would list MASTERS odds oftenly so maybe a forum has it posted for BETCRIS, BETMAKER or BOOKMAKER (ALL SAME UMBRELLA), somewhere.