They were not necessarily uncontested draws at all. The game between Wesley So and Levon Aronian is one example where Aronian traded his two minor pieces for a rook and a pawn early on, but just as the game started, the game ended even.[replay]
Wesley So still leads the tournament so far, after applying the tiebreak. See standings below:
Sinquefield Cup 2016 Ranking after Round 3
Photo credit: Grand Chess Tour.