Cowboys All-Pro guard Zack Martin says he's OK after sustaining a neck stinger in practice earlier this week. Martin was injured Tuesday in the second of two joint practices with St. Louis at training camp. The Cowboys are being cautious with left tackle Tyron Smith (right arm muscle strain), left guard Ron Leary (back) and right tackle Doug Free, who recently returned to practice after missing two weeks mostly to rest a sore foot and ankle. More...