The 49ers could be getting a huge piece of their defense back very soon.
All-Pro cornerback Richard Sherman hasn't played since the season-opening loss to the Arizona Cardinals and has been on injured reserve with a calf injury, but the 49ers opened his practice window Monday, meaning they'll have up to three weeks to decide whether or not to activate him. Sherman now is eligible to practice, and there's a possibility he will be activated in time for San Francisco's road matchup with the New Orleans Saints on Sunday.
Even if Sherman can't go against the Saints, it sounds like it won't be long until he's back out on the field.
With our All Access Daily newsletter, stay in the game with the latest updates on your beloved Bay Area and California sports teams!

He told The Athletic that he is "working hard to potentially return this weekend against the Saints, but he added that he’s eyeing a return for the Nov. 29 game against the [Los Angeles] Rams as a worst-case scenario."
Download and subscribe to the 49ers Talk Podcast
The 49ers have a bye in Week 11, so the game against Los Angeles would represent Sherman's next chance to play if he's not activated by Sunday. Given the additional week off, the 49ers might be inclined to hold Sherman out against New Orleans to give him that much more time to recuperate. On the other hand, they really could use him on Sunday against Michael Thomas and the Saints' passing attack.
The 49ers have been torched by top-tier receivers like DK Metcalf and Davante Adams in recent weeks, and Thomas is just as good, if not better than both of them. Though Sherman wouldn't necessarily be matched up with Thomas if activated, his presence surely would be a big boost for San Francisco's defense going up against a New Orleans offense that made light work of the Tampa Bay Buccaneers last week.
If Sherman's own social-media activity is any indication, he just might be able to provide that boost.
RELATED: Why 49ers still have NFL playoff chance as Week 10 begins
Whether it's this week or following the bye, there's no question that the 49ers' defense will be significantly improved by Sherman rejoining the fray.
San Francisco 49ers
Find the latest San Francisco 49ers news, highlights, analysis and more with NBC Sports Bay Area and California.
The sooner he does, though, the better.