Daniel Summerhays surges to the top of the leaderboard at the John Deere Classic at TPC Deere Run. Daniel Summerhays / Getty Images Daniel Summerhays shot a -9 under par 62 in the third round of the John Deere Classic, and is taking a two shot lead into the final round at -19 under par. He said he will not make the usual mistakes again; " I know there's going to be obstacles and challenges, as there always are. There are always things that stand in your way. But I'm just excited to see what those are and deal with them. I think when I'm playing well the mentality is make as many birdies as you can. I'm really looking forward to Sunday. I'm playing really well." One shot back on -17 under par is David Hearn, with Zach Johnson one stroke further back on -16 under par. Zach has not given up hope of defending his title; "I certainly think there were a lot more positives out there than negatives, my putter has been great. Even the ones I've missed have been great."