Kaymer put his improved effort down to a decision to stop thinking too much and stop chasing the perfect shot all the time.
"Well, I stopped thinking (Laughter)," he said when asked the reason for his opening round brilliance. "That's pretty much the bottom line. I thought a lot the last two years about swing changes, about this and this, that every shot I made I reflect on it, what I did wrong, what I did right, and then, I think, a couple weeks before the Masters I worked a little with my coach.
"He came to Phoenix, and then I went to Germany the week before, and we had a good session. And then it just clicked a little bit that I thought, okay, I know I can hit pretty much every shot when I needed to hit it. If it's a draw, if it's a fade, low or high, I know that I can do it. It's just a matter of getting the confidence on the golf course and then letting it happen and really doing it."
Given the mental fatigue that a layout such as the TPC Sawgrass can produce it is perhaps fitting that he chose to think less and act more. The results are there for all to see at the halfway mark the 2010 PGA Champion leading this world class field into the weekend.
It has been eighteen months since Kaymer, a former World Number One now ranked 61, has won an event but the manner in which he has handled his game and the TPC Sawgrass suggests his follow up win is not far off.
His recent 31st placed finish at the Masters might not sound all that impressive but it was his best ever at Augusta National, an event that in its own way had played a role in his downturn in that he worked hard on trying to build a draw into his natural left to right game to accommodate the shot shape required at Augusta.
Kaymer leads by one over the brilliant 20 year old Jordan Spieth who, just as was the case at Augusta National when sharing the runner-up position, is playing this event for the first occasion.
Spieth produced a bogey free round of 66 to get within one of the lead as he chases his second PGA Tour victory, although there have also been five runner-up finishes in his short career.
Russell Henley is three shots back and alone in 3rd position, whilst at 6 under and six behind and sharing 4th position are Lee Westwood, Sergio Garcia, Jim Furyk, Justin Rose and Gary Woodland.
John Senden, Geoff Ogilvy and Matt Jones share the leading Australian honours at 5 under par and seven from the lead.
Steve Bowditch, Stuart Appleby and Adam Scott made the cut on the number.
Scott was impressive in his recovery from his opening round of 77. His second round of 67 got him back to the cutline and he now retains an outside chance of the top 16 finish he needs to earn the number one place in the game.