The NFL preseason has ended. The regular season is less than a week away from kicking off and that means it's time for teams to cut their rosters down to 53 players before Saturday's deadline.

Thursday night's 16-game slate marked the final chance for players to prove their 53-man roster worthiness. Here's what we learned from Week 4 of the 2018 NFL preseason so far.

The Lions continue to seek ways to help their less-than-stellar pass rush. The team on Monday inked veteran defensive end Robert Ayers to a one-year deal, NFL Network Insider Ian Rapoport reported.

Week 2 of the NFL preseason is here, giving us the opportunity to reaffirm some of the standout performances we saw from high-profile rookies and unheralded grinders last week.

When Detroit's veterans report to camp on Thursday, Ezekiel Ansah won't be among the actives.The 29-year-old pass rusher was placed on the physically unable to perform list.

The Falcons will secure a spot in the playoffs with a win over the Panthers or a Seahawks loss. Kevin Patra has everything else you need to know as Week 17 kickoff approaches.

Dwight Freeney was released without warning last week after recording three sacks in four games with the Seahawks, and became a Detroit Lion in less than 24 hours. Talk about a holiday weekend.

The games on Sunday during Week 4 had several upsets and big plays. Here are some of our big takeaways:

The Lions (3-1) knocked out the Vikings (2-2) in a game that saw Minnesota suffer a season-altering injury on offense. Marc Sessler has what we learned from Detroit's 14-7 victory.

Alvin Kamara, Chris Carson and Chris Godwin all showed promise over the weekend. Gregg Rosenthal lists the best and worst of the NFC in Preseason Week 3.

Lamar Jackson, the reigning Heisman winner who's been compared to Mike Vick, is high on Chase Goodbread's list of CFB's most freakish athletes, but he's not No. 1.

Bucky Brooks grades the rookie class of each team in the NFC North. Did Leonard Floyd's Bears outperform Kenny Clark's Packers? Plus, each squad's combine/free agency focus.

With the regular season in the rearview mirror, Bucky Brooks reveals his ranking of all 32 teams based on the impact of their rookies in 2016.

CFB 24/7 is unveiling its choices for the Mount Rushmores -- top 4 all-time NFL players -- from 10 top CFB programs. The series continues with the Penn State Nittany Lions.