Defending champions Matt Kuchar and Harris English opened with a 57 at The Ritz-Carlton Golf Resort, and the teams of Keegan Bradley-Camilo Villegas, Graeme McDowell-Gary Woodland and Ryan Palmer-Jimmy Walker shot 59.
All 12 teams were 11 under or better. The teams will play a modified alternate shot Friday and close with a better-ball round Saturday.
Day and Tringale had only three pars. They eagled Nos. 13 and 14.
Kuchar and English birdied 14 of their last 15 holes.