By Matt Hladik Pittsburgh Steelers star T.J. Watt was shaken up early in the first quarter of tonight’s game. After taking a big hit on Pittsburgh’s first defensive possession against the New England Patriots, Watt left the game and entered the blue medical tent on the Steelers’ sideline. The standout pass rusher took an inadvertent leg to the head from Pats running back Ezekiel Elliott while attempting to make a tackle. Steelers beat writer Alan Saunders, who is covering the game, tweeted that it appeared an NFL concussion spotter also went into the tent with Watt. Watt has since returned to …