(AP Photo/Michael Dwyer) Rookie wide receiver Tyquan Thornton has been turning heads all summer at camp and preseason game. Unfortunately, the speedster suffered a collarbone injury in Friday night’s preseason game against the Panthers and is expected to miss 8-10 weeks. On the surface, you might not think this is a big blow for the Patriots offense, but it is when you consider the fact that Thornton complemented this receiving…