"Yesterday I was just way too caught up with the line of my putts and lost speed control. Today I was just trying to put a good stroke on it and feel the putt. That definitely helped a lot."
With birdies at the second and sixth holes today, Lee went out in a one-under par front nine of 35. His way home was boosted by two late birdies on the 16th and 18th holes which got him back to the clubhouse on one-under for the day and four-over for the tournament.
Lee will continue straight into the next PGA Tour event, the RBC Heritage, which begins on Thursday in South Carolina - but is then looking forward to a short break.
"I've got good momentum going, but there's a lot of mental wear from this week, I definitely deserve a week off, he said.
American defending champion Jordan Spieth was the leader at the turn on seven-under par, five strokes clear of England's Danny Willett in second. Dane Soren Kjeldson and American Dustin Johnson were tied for third on one-under - with that quartet of players the only ones under par with nine holes remaining.