Dallas Cowboys quarterback Tony Romo missed a third scheduled practice Saturday out of the first eight of training camp. The Cowboys’ plan is that Romo doesn’t play in the first preseason game at San Diego on Thursday or in the last preseason game Aug. 28 against Denver. The Cowboys want Romo to get some work in the second preseason game against Baltimore on Aug. 16 and get his most work of the preseason in the third game at Miami on Aug. 23. Romo, who is coming off of two back surgeries, hasn’t practiced on five of the 10 days the Cowboys have been in camp (the entire team was off two of those days). Romo is expected to get some work Sunday but it won’t be extensive during the team’s annual Blue/White Scrimmage.