With much speculation about who will take over the starting center job, rookie lineman Tate Ratledge has emerged as the favorite to begin camp.

The NFL season is underway. The road to San Francisco for Super Bowl 60 begins in the grueling summer heat. Some teams have new coaches. A couple of old coaches have new teams. Star players have switched uniforms. There are position battles to determine. And, plenty of storylines to watch.

ALLEN PARK, Mich. — Detroit Lions defensive lineman Levi Onwuzurike is out for the season after having knee surgery, a setback for a franchise that was counting on him to fill in for Alim McNeill. Lions coach Dan Campbell made the announcement Sunday morning, hours before his team had its first training camp practice of the year.

Detroit Lions coach Dan Campbell said Sunday that Anzalone, a team captain linebacker, is in Allen Park and has reported for training camp after missing voluntary Organized Team Activities (OTAs) during the spring.

With NFL training camp season upon us, Kevin Patra provides a refresher on the Detroit Lions' roster changes, position battles and notable subplots.

With St. Brown and Williams solidified as the top options, any competition starts with Patrick and the third spot. He was very reliable last year, and as a result he will have a leg up on the competition. However, TeSlaa could make things interesting with a strong camp.

ALLEN PARK -- Second-round picks have started signing their deals around the NFL after flirting with holdouts as training camps begin, and that is very good news for the Detroit Lions.