The milestones keep piling up.

Justin Herbert: Fastest to reach 1,000 career completions (38 games).

Justin Herbert: Most completions — 1,062 — through the first three seasons of a career, passing former Colts quarterback Andrew Luck.

Justin Herbert: 20 career games with 300-plus passing yards, the most by any player in his first three seasons.

Next for Justin Herbert: 90 touchdowns through his first three seasons — he needs one more to join Hall of Famer Dan Marino as the only players in history to reach that mark.

"I haven't been paying any attention to that," Herbert said. "The most important thing is how we are doing as a team and what we can get better at collectively."

The 24-year-old is eligible for a contract extension at season's end that the Los Angeles Chargers will likely attempt to expedite as they stare down a blockbuster quarterback market. Joe Burrow, the 2020 No. 1 pick who led the Cincinnati Bengals to a Super Bowl appearance last season, fifth overall pick Tua Tagovailoa, who has the Dolphins on pace for their first postseason appearance since 2016, Philadelphia Eagles quarterback Jalen Hurts, a 2020 second-round pick whose team is atop the NFC standings, and quarterback Lamar Jackson, who has made three playoff appearances over the last four seasons, will all be in the mix for extensions.

"For [Herbert] the number has to be $50 million [per year] and higher," Mike Tannenbaum, ESPN's front office insider and former NFL executive, said.