Dallas Cowboys tight end Jason Witten gave an first-hand update on Tony Romo and assured fans that the quarterback's passing ability hasn't been altered by his back surgery.

"He is throwing good," Witten told the Dallas Morning News on Tuesday. "I have caught a lot of balls over the years and it's the same zip, same as always. He looks good."

Romo had surgery in late December to fix a herniated disc.

Along with his teammates, Romo has been participating in offseason workouts since they began earlier this month. According to the rules during this period of sanctioned activities, Romo is only permitted to throw to receivers who are not being covered by other players.

Witten told the newspaper that he admires the 34-year-old Romo's toughness.

"I think just the will that guy has -- it's at the top of the list of the players I've seen," Witten said. "Like I said, we know what people are going to say. But I think for us and for him it's just go out there and get better and kind of perfect that craft so when you get to the chance, you take advantage of those opportunities."

Romo had surgery to relieve the pressure of a herniated disk on Dec. 27, two days before the Cowboys' regular season ended with a loss to the Philadelphia Eagles in Week 17.

Romo has undergone two back procedures in the past year. Romo also had a cyst removed from his back last spring, but that issue was unrelated.