NFL free agency officially begins at 4 p.m. ET March 12, but teams can start negotiating with players on March 10. We have you covered with everything you need to know. That includes a preview of what to expect, a look at the best available players, key teams to watch, quarterbacks who could be on the move, perfect player-team fits, bold predictions and interesting sleepers.

We also picked out free agents who could break the bank and asked one big question to our Patriots, Bengals and Saints reporters. Finally, we wrap it all up with an evaluation of how deals could impact April’s NFL draft and next season’s fantasy football landscape.

Here’s what you need to know about free agency. (Salary cap figures are via Roster Management System as of March 5.

What can we expect in free agency, and when does it start?

Quarterback Matthew Stafford and the Rams reached an agreement on a contract adjustment, which created a trickle-down effect for all quarterback-needy teams — the Raiders, Giants, Steelers and Browns. The most notable quarterbacks in free agency are Sam Darnold, Justin Fields, Russell Wilson and Aaron Rodgers (whom the Jets are expected to release).

With the salary cap increasing by $23.8 million to a record $279.2 million, many teams will have plenty of cap space to shop with when the negotiating window opens at noon ET on Monday

On offense, some moves ahead of the franchise-tag deadline and negotiation window reshaped the class of receivers available. The Bengals tagged Tee Higgins, who would have been the top receiver in free agency, for a second consecutive season. The Jets released receiver Davante Adams, who should have many options but will have to decide whether he wants to team up with Rodgers again or forge his own path forward. Chris Godwin (ankle) and Stefon Diggs (ACL) are set for the open market, but both are coming off season-ending injuries, so it will be interesting to see how that affects their value.

Outside of receiver, watch for teams to spend on the offensive line, where tackle Ronnie Stanley and center Drew Dalman have each reached free agency.

Defensively, there’s always a premium placed on pass rushers. There will be a market for veterans Josh Sweat, Khalil Mack, Haason Reddick and Joey Bosa, each of whom could provide an immediate impact. — Lindsey Thiry, national NFL reporter