The Dallas Cowboys quarterback was going through regular work Tuesday after coach Jason Garrett said he would practice "very lightly" on the 10th day of training camp.
Romo hasn't shown any signs of trouble in camp after having a cyst removed from his back in April.
But the procedure led to a mostly idle offseason for his arm and legs, and some intriguing issues the first week of camp.
Garrett hasn't told reporters whether Romo will play in the preseason opener after suggesting to the team's flagship radio station that he would rest. And there are questions about how far behind he was physically when he came to California.
Romo in action?
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