I just got done reviewing every down of the second half. Brees got the ball out quickly. In fact, only two throws weren't out by a three count. The Texans D-Line put pressure on Brees but it's almost impossible to get sacks when the offense is playing pitch and catch on quick hitting routes. Giving a ten yard cushion and running five yards off the receiver while in man coverage is what allowed Brees to win this game. No coverage on his primary read means no need for check downs hence quick throws and no sacks taken.