Ohio State offensive coordinator Chip Kelly called it like he saw it at the start of training camp. “Offensively, honestly, in the first eight practices got our tails kicked, Kelly said Thursday. “That is a pretty good defense.” Buckeyes defensive coordinator Jim Knowles, by the way, disagrees. “That’s kind, but it’s a battle every day,” Knowles said minutes later when it was his turn at the podium in the Woody Hayes Athletic Center. “I mean, you got offense, great receivers, good running game. It’s just a battle every day. “It’s back and forth. Iron sharpens iron, and everybody’s challenging …