San Francisco 49ers defensive end Nick Bosa (97) Darren Yamashita-USA TODAY Sports

Nick Bosa has missed all of training camp for the 49ers amid a contract standoff with the team.

Bosa is looking for a new deal and seeking major money. San Francisco wants the reigning Defensive Player of the Year playing in Week 1, but they’re also trying to be mindful of their salary cap constraints.

So, just how far apart are the two sides?

SI’s Albert Breer responded to fan questions for a mailbag column published on Thursday. He answered a question about Bosa and said the two sides are fewer than $4 million apart.

Breer also implied what is at the heart of the dispute.

Breer implied that the 49ers are going to make Bosa the highest-paid edge rusher in the NFL. However, it sounds like Bosa wants to become the highest-paid non-quarterback of all time.

Aaron Donald, who is a defensive tackle, is currently the highest-paid non-quarterback at $31.67 million in average annual salary. T.J. Watt is the highest-paid defensive end with a $28 million average annual contract value.

Bosa is a defensive end and is set to make $17.86 million in the upcoming season. He will be getting a pay raise, it’s just a matter of how much.

More must-reads:

TODAY'S BEST
Pacers' Pascal Siakam leads team to Game 6 win vs. Knicks
Watch: Matt Duchene's 2OT winner sends Stars to conference final
Scottie Scheffler shoots improbable 66 after warming up for PGA Championship in a jail cell
Report: Tua Tagovailoa away from Dolphins amid contract chatter
Nuggets star has worrying comment about latest injury
Paul Skenes makes incredible Wrigley Field history in second-career MLB start
Giants rookie CF to undergo season-ending labrum surgery
Yankees' Juan Soto reacts to Hal Steinbrenner contract talk
Late goal sends Panthers to Eastern Conference Finals
Ex-teammate of Shohei Ohtani placed bets with same illegal bookmaker as interpreter 
Former Rams first-round pick retires from NFL after 11 seasons
Insider provides major injury update on Celtics' Kristaps Porzingis
Watch: Bruins strike first in Game 6 with incredible backhand goal
Dodgers make series of moves involving notable players
Hurricanes not expected to re-sign defenseman, center
Maple Leafs tab former Stanley Cup winner as new head coach
NFL insider expands on competition between Steelers QBs Russell Wilson, Justin Fields
NFL sets outrageous prices for Eagles-Packers Brazil game
Broncos 'very unlikely' to bring back former NFL interceptions leader
Greg Olsen offers broadcasting advice to Tom Brady