Jason Garrett (left) and his older brother John (right)

While Jason Garrett was announced as the next head coach of the Dallas Cowboys, his older brother John, the Cowboys tight ends coach, could be on his way out of Valley Ranch.

John Garrett is on the list of candidates the Miami Dolphins are interested in to fill the vacant offensive coordinator position that opened when former OC Dan Henning retired. The Dolphins GM Jeff Ireland and head coach Tony Sporano have worked with John during their time with the Cowboys.

In fact, Witten is already the second-favorite choice of quarterback Tony Romo, but rarely is Witten playing in the slot.

What this also means is rookie Martellus Bennett, who came around in the second half of training camp to impress coaches enough to think he can start right away, should see some significant playing time at tight end. Bennett, a jester of a player who stole the show on HBO’s Hard Knocks series, started off looking irritable, lazy and childish.

But tight ends coach John Garrett was all over Bennett and pushed his buttons all through camp. It seemed that in the third week of camp and that third preseason game, Bennett started to turn a new leaf. Now, he should play against Cleveland in the opening game on Sept. 7. It’s a risky move putting Bennett in this role so quickly, but the Cowboys lost two receivers who were competing for that third slot.