The John Deere Classic's top pre-tournament favorite, Cameron Young, leads the leaderboard after two rounds. The second round proved to be extremely competitive, with many ties and ups and downs.Young played at an exceptional level on Friday at the John Deere Classic. There were eight birdies with one bogey, to close with -7 (-13 overall). He started the round very strong, with three birdies in a row and then kept the pace to climb to the top.John Deere Classic@JDCLASSICPretty nice little Saturday coming up. Cameron Young leading a packed leaderboard. @dariusrucker after the last putt…9Pretty nice little Saturday coming up. Cameron Young leading a packed leaderboard. @dariusrucker after the last putt… https://t.co/CpEasb7IayTied for second place at the John Deere Classic were Adam Schenk and Garrick Higgo, who played for an identical -5 (-11 overall). They were joined by Brendon Todd, who carded -6.'Rookie sensation' Ludvig Aberg scored -7 and climbed 18 spots to place T5 at the John Deere Classic. One of those tied with Aberg is Denny McCarthy, who turned in one of the best performances of the day.McCarthy birdied seven of his last nine holes in the round. It was a total of 10 birdies that would have put him in a share of fifth place, but for an unfortunate double bogey on the 10th hole.The other who put in a spectacular performance was Jim Herman, who made seven birdies in a row (from hole 7 to 13).The competitiveness of the John Deere Classic's second round was so strong that six players tied for the best score of the day (-8). All of them made spectacular jumps in the leaderboard, the most important of them for Kevin Roy, who reached T5 climbing 36 places.But it was not the biggest jump as Kevin Streelman and Jim Herman climbed 79 places to T10. Yuto Katsuragawa, meanwhile, jumped 97 places to T18 and Sepp Straka 104 to T29.A case in point is Michael Thorbjornsen, an amateur who played the first round for +2, but "pulled out from under his sleeve" a -8 this Friday to achieve one of the best scores of his young career.The cut line was set at -4. Among the players cut were Emiliano Gruillo and Adam Hadwin.John Deere Classic full leaderboard after Day 2The following is the full leaderboard of the John Deere Classic after Day 2. Only players who made the cut where included:1 Young, Cameron -13T2 Schenk, Adam -11T2 Higgo, Garrick -11T2 Todd, Brendon -11T5 Aberg, Ludvig -10T5 Mouw, William -10T5 McCarthy, Denny -10T5 Roy, Kevin -109 Hubbard, Mark -9T10 Murray, Greyson -8T10 Glover, Lucas -8T10 Streelman, Kevin -8T10 Kuest, Peter -8T10 Gribble, Cody -8T10 Herman, Jim -8T10 Kirk, Chris -8T10 Lashley, Nate -8T23 Poston, J.T. -7T18 Bhatia, Akshay -7T18 Yuto Katsuragawa -7T18 Sigg, Greyson -7T18 Blixt, Jonas -7T18 Power, Seamus -7T18 Svensson, Adam -7T18 Mitchell, Keith -7T18 Walker, Jimmy -7T18 Ghim, Doug -7T18 Goya, Tano -7T29 Smalley, Alex -6T29 Werenski, Richy -6T29 Duncan, Tyler -6T29 Straka, Sepp -6T29 Hardy, Nick -6T29 Kodaira, Satoshi -6T29 Cole, Eric -6T29 Stroud, Chris -6T29 Daffue, MJ -6T29 Gerard, Ryan -6T29 Thorbjornsen, Michael -6T29 Hossler, Beau -6T29 Merritt, Troy -6T29 NeSmith, Matt -6T29 Stuard, Brian -6T29 Dufner, Jason -6T45 An, Byeong Hun -5T45 Thompson, Davis -5T45 Ramey, Chad -5T45 Champ, Cameron -5T45 Streb, Robert -5T45 Noh, S.Y. -5T45 Baddeley, Aaron -5T45 Smotherman, Austin -5T45 Yu, Kevin -5T45 Jaeger, Stephan -5T45 Endycott, Harrison -5T45 Henley, Russell -5T45 Knox, Russell -5T45 Reavie, Chez -5T45 Griffin, Lanto -5T45 Novak, Andrew -5T45 Sargent, Gordon -5T62 Higgs, Harry -4T62 Ogilvy, Geoff -4T62 Matthews, Brandon -4T62 Hickok, Kramer -4T62 Kuchar, Matt -4T62 Johnson, Zach -4T62 Landry, Andrew -4T62 Hahn, James -4