With Zach Cunningham sidelined by injury, the defense needs a proven tackler at inside linebacker. Joe Schobert, recently signed to the practice squad, could be the guy. View the original article to see embedded media. NASHVILLE – The Tennessee Titans will be without the services of a player who once led the NFL in tackles this Sunday in Indianapolis. One man who might help replace him? Another player who once led the league in tackles. Coach Mike Vrabel ruled out starting inside linebacker Zach Cunningham for Sunday’s game against the Indianapolis Colts. Cunningham sustained an elbow injury last Sunday against…