The Lions training camp has begun. Here are players and key position battles to watch -- and a 53-man roster projection.

The Detroit Lions were back at camp on Sunday, and there were some big things to talk about right off the bat. The biggest story was obviously the loss of Levi Obwuzrukie for the season. That's a hard blow.

We’ve seen growth in training camp translate to the regular season. It’s helped guys solidify their roles and get paid. With camp set to begin Sunday, it’s a good time to look at players who could benefit the most from strong performances.