It was the first practice of training camp, but James Harrison appeared to be in midseason form.
Harrison collided with fullback Tank Summers during a team drill that resonated around the St. Vincent College campus. Then, during the first play of 11-on-11, Harrison leveled Rashard Mendenhall after the running back caught a pass out of the backfield from Ben Roethlisberger.
"James is capable of that," Steelers coach Mike Tomlin said. "He probably wasn't even trying to do it."
Mendenhall quickly popped up and patted Harrison on the helmet.
Safety Ryan Clark had a chance at a knockout shot against Hines Ward earlier in practice, but decided to pull up at the last moment.
» During one-on-one linemen drills, it turned into a battle of first-round picks when 2009 top choice Ziggy Hood went against this year's No. 1 Maurkice Pouncey.
Hood delivered a slap to Pouncey's upper shoulder/helmet region that knocked the rookie flat on his behind.
Read more: http://www.pittsburghlive.com/x/pitt.../s_692952.html