Titans' Zach Mettenberger leaves game vs. Texans after hit from J.J. Watt

Tennessee Titans quarterback Zach Mettenberger left Sunday's game against the Houston Texans after taking a hard hit from J.J. Watt. 

Mettenberger was taken to the locker room and is questionable to return.

Jake Locker replaced Mettenberger and promptly threw an interception.