Carolina Panthers linebacker A.J. Klein has started 10 games, had a 10-tackle performance last year at Baltimore and dropped San Francisco quarterback Colin Kaepernick for a 14-yard loss on his first career sack.
So Klein is far from an NFL newbie.
But when you're replacing a two-time Pro Bowler who has led the NFL in tackles in two of the past three seasons, it's kind of a big deal.
Middle linebacker Luke Kuechly remains in the NFL's concussion protocol and his status for Sunday's game against Houston remains uncertain. But signs seem to be pointing toward Kuechly missing his first NFL start.
Kuechly has yet to practice this week, and...