If Mike Matthews is frustrated with his lack of playing time and production, the five-star Tennessee freshman isn’t showing it. At least not in front of wide receiver coach Kelsey Pope. “What that kid has done,” Pope said of Matthews on Tuesday, “he’s done an incredible job of not paying attention to outside factors. He could be, but around me, around this building. He’s dialed in, he’s got a great attitude, he’s hungry. “That doesn’t mean he’s not frustrated,” Pope added. “He’s hungry and that’s all I can ask for. He’s got a really bright future here because he’s got the attitude and it’s onl…