The Los Angeles Chargers bolstered their offensive line, while the Tennessee Titans secondary took a major hit in free agency.

With team-building season officially underway, PFF takes a look at the 250 best players available in the 2021 NFL free agency class.

PFF's Andrew Erickson breaks down the biggest fantasy football risers and fallers in his 2021 best ball rankings after the first week of NFL free agency.

PFF data scientist Timo Riske looks at how fast the average NFL player ages and how it varies through different positions.

2021 NFL free agency kicked off with a bang, and while some teams stayed dormant, others attacked with reckless abandon. Here is how each of the league's 32 franchises fared ahead of the 2021 NFL Draft.

With the biggest wave of signings now behind us, it’s time to readdress all 32 teams’ biggest needs as they approach the 2021 NFL Draft.

PFF looks at each position and highlights the most overrated and underrated free-agency signings so far. Cleveland's move for John Johnson III and Troy Hill comes out on top, while the Bengals' decision to sign Trey Hendrickson comes under scrutiny.

PFF's Ben Linsey breaks down why free agent edge defenders Jadeveon Clowney and Melvin Ingram might end up being two of the best values of 2021 NFL free agency.

Players such as Kansas City Chiefs wide receiver Tyreek Hill have forced defenses to adapt to speediness from an inside alignment.

With the 2021 NFL Draft just over a month away, PFF's Kevin Cole looks at Buffalo RB Jaret Patterson, using Patterson's pro-day data to compare him to past prospects and pick out the most similar comps.

With the 2021 NFL Draft just over a month away, PFF's Kevin Cole looks at Stanford WR Simi Fehoko, using Fehoko's pro-day data to compare him to past prospects and pick out the most similar comps.

Mike Renner mocks the first three rounds of the 2021 NFL Draft, sending Zach Wilson to the Jets and Justin Fields to the San Francisco 49ers. The Washington Football Team, Chicago Bears and Pittsburgh Steelers also target QBs on Day 2.

PFF's Andrew Erickson breaks down the fantasy football implications of the New York Giants signing wide receiver Kenny Golladay in 2021 NFL free agency.

Kenny Golladay was PFF's No. 1-ranked free-agent receiver after franchise tags were handed out.

PFF's Ian Hartitz offers a a fantasy football-themed breakdown on every relevant quarterback, running back, wide receiver and tight end who has been tagged, traded or signed in 2021 NFL free agency.

The Steelers will head into next season with a starting wide receiver trio of Diontae Johnson, Chase Claypool, and Smith-Schuster — all three are locked into the WR2 range in fantasy football.

With the 2021 NFL Draft just over a month away, PFF's Kevin Cole looks at WR Seth Williams, using his pro-day data to compare him to prospects in prior years and pick out the most similar comps.

An early look into how the flurry of free agency signings has impacted the NFL futures betting market for division winners.

PFF's Andrew Erickson breaks down the biggest fantasy football losers from 2021 NFL free agency, led by Las Vegas Raiders running back Josh Jacobs.

The Washington Football Team attacked free agency by signing William Jackson III, who has extensive experience in man coverage schemes.