Bill Callahan is replacing coach Jason Garrett as the play-caller for the Dallas Cowboys.
Tony Romo pointed here and there, showing receiver Dez Bryant the best way to use a block on the first day of offseason practice.
Cowboys quarterback Tony Romo will miss at least three weeks of offseason workouts after a procedure to remove a cyst from his back.

For the past four seasons, Chip Kelly coached the University of Oregon and built one of college football's most dynamic programs. The protocols he established there included scoring points, winning games and scoring more points. Now he hopes to do the same in Philadelphia.
Monte Kiffin figures he could be 52 and coaching the 3-4 defense instead of 72 and running the 4-3.
The Dallas Cowboys hired former Tampa Bay defensive coordinator Monte Kiffin as the replacement for Rob Ryan on Friday.
Dallas defensive coordinator Rob Ryan was fired Tuesday after his injury-depleted unit struggled in a pair of season-ending losses that kept the Cowboys out of the playoffs for a third straight year.
Tony Romo sat alone on the Dallas bench, his stare frozen at the ground on a cold night in Washington.

The Dallas Cowboys should know this drill by now.
Jason Witten had nearly as many drops as catches through three games this season, back when his side still hurt just about every time he moved because of a lacerated spleen.
The Dallas Cowboys couldn't trust receiver Dez Bryant to even run the right routes less than two months ago.
The corner locker assigned to Jerry Brown at the Dallas Cowboys facility remained untouched Wednesday.

Dallas Cowboys receiver Dez Bryant went to see another doctor Wednesday to help determine if he can play the rest of this season with a broken finger on his left hand.
Jason Garrett gave the Dallas Cowboys a day off after his players somehow pulled off a win in Cincinnati while reeling from a one-car accident that killed one teammate and landed another in jail.
The Dallas Cowboys might be without wide receiver Dez Bryant for their playoff push.
Garrett said his refusal to announce the change had nothing to do with whether he agreed with it.
"There is no real advantage for us to reveal who's calling the plays explicitly, and how we're going to do it, in early June," Garrett said. "It's just the way I feel about it. We have a plan in place. We've had a plan in place for a long, long time. I don't want to get into that plan much further than I already have."