Michael Thorbjornsen is over his knee surgery and shed the brace in time to post an 8-under 64 on the Plantation course Thursday and share the lead to par with fellow Stanford alum Maverick McNealy at the season-ending RSM Classic on the PGA Tour. McNealy had an 8-under 62 on the Seaside course at Sea Island, which was more exposed to the chilly wind that ripped through the Golden Isles. Ludvig Aberg, the No. 5 player in the world, had not competed since the Tour Championship, taking time off for meniscus surgery and returning to the site where he tied the PGA Tour’s 72-hole scoring record.