The Detroit Lions' first day of training camp was an eventful one. It began with fifth-year coach Dan Campbell telling reporters that defensive tackle Levi Onwuzurike is out for the season after ACL surgery.

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.

One Lions player will emerge as the training camp darling. The apple of the fans' eyes. The roster hopeful that the masses rally behind and exaggeratedly cheer during practices and preseason games. Make no mistake, it's going to happen in 2025.

Detroit enters 2025 as one of the favorites to represent the NFC in the Super Bowl in February, but first the foundation must be laid and that begins with training camp over the next month. Here are five things I'll be looking out for when camp kicks off this week:

Detroit Lions head coach Dan Campbell met with the media for the first time at training camp on Sunday and told reporters what his biggest concern is for the team going into it.

The Detroit Lions waived undrafted rookie RB Anthony Tyus at the start of training camp with a non-football illness designation

The Detroit Lions are strong at the top of their depth chart, but training camp battles will always be plentiful this time of year.

The Detroit Lions have big shoes to fill after the retirement of Frank Ragnow. In their first practice of training camp on Sunday, the Lions may have revealed the approach they're going to take.

There are always fights in training camp, especially during joint practices, and these nine New York Giants are the most likely to be involved.

Detroit's 2025 first-round pick is billed as a ready-made run-stuffer. With the Lions ' emphasis on stopping opposing run games first and foremost, this should lead to some playing time for the rookie even if it's just in a rotational role.

Detroit Lions rookies report to training camp on Wednesday, and veterans arrive on Saturday. That means training camp is essentially already here. And after a shortened spring program, it’s fair to say the excitement for this team is at an all-time high.