Let's take a look at the stats that have been key to the 49ers undefeated start.

Kyle Shanahan provided injury updates ahead of the 49ers Week 7 matchup against the Redskins.

After six weeks of football, find out where Pro Football Focus lists the 49ers defense. 

Both Richard Sherman and Ahkello Witherspoon are off to fast starts in 2019 as the duo land on PFF’s Top 25 cornerbacks. 

The defense had a standout session with five takeaways during the 49ers final practice at the SAP Performance Facility.

The 49ers closed the weekend with an evenly-matched practice ahead of a much needed day off on Monday.

San Francisco's pass catchers "had a day" during Saturday's session.

Notes from Sunday's training camp session, highlighted by the defense.

Addressing the top uncertainties that the 49ers face heading into 2019 training camp.

Saleh provided health updates, player evaluations and position changes.

Sherman said he believes in the trio of embattled defensive backs.

Jimmy Garoppolo and Jerick McKinnon headline this list full of notable names.

Shanahan provided notes on the 49ers offensive line, Marquise Goodwin and Jerick McKinnon from the annual NFL meetings.

John Lynch told reporters on Monday that the 49ers will look to take advantage of Ward's versatility in 2018.

The 49ers recent roster moves earned a perfect grade in free agency from Bleacher Report.

Ward shared the story about his conversation with Sherman and unveiled his new number.

A numerical look at the cornerback's seven-year history in the NFL.

Analysis of how Richard Sherman impacts the 49ers both short term and long term.

See how members of the 49ers, media and NFL reacted on social media to San Francisco's signing of Richard Sherman.

John Lynch explained how Witherspoon impressed the 49ers during his interview at last year’s Combine.

Brad Gagnon of Bleacher Report named two members of San Francisco’s 2017 rookie class as players ready for breakout sophomore campaigns.

Check out the pre-combine mock drafts as the football world gets ready to convene in Indianapolis.

San Francisco had one of the NFL's most productive rookie classes in 2017 with plenty to build on in 2018.

A numerical recap of key milestones and statistics from the 49ers 2017 season.

Reuben Foster and other members of the 2017 rookie class had standout rookie campaigns per Pro Football Focus.

The 49ers locker room picked the teammates they would like to room with, and maybe a few they wouldn't. Find out who they chose.

DL Arik Armstead, DB Jimmie Ward, T Mike McGlinchey, S Jaquiski Tartt, WR Deebo Samuel and CB Ahkello Witherspoon discussed the overall team performance in the 37-8 victory over the Green Bay Packers.

The 49ers held a fashion show featuring guests representing all cancers who have either battled or are currently battling cancer as they modeled apparel donated by Levi's® alongside 49ers players.

Find out which five players have played the best after the first four games of the season according to Pro Football Focus.

Tim Ryan breaks down the 49ers strong defensive performance to open the season in this ORIG3N DNA of a Play.

The 49ers locker room debated whether they would rather lose their luggage or miss their flight in this week's Pregame Precheck presented by IdentoGo.

Witherspoon broke down his pick-six play in Tampa Bay and discussed his emphasis to build a sustainable routine for 2019.

Watch the top highlights from the 49ers victory over the Tampa Bay Buccaneers in Week 1.

Witherspoon intercepts the Jameis Winston pass for the 49ers third pick on the day.

The 49ers cornerback talked about his preparations for the 2019 season and broke down the difficulties of covering Kyle Shanahan’s offense.

The former Colorado defensive back discussed his excitement to start rookie camp and how playing other sports growing up helped him fine-tune his skills as a corner back.

The cornerback left Colorado ranked 13th in school history in passes defensed with 28. Here are some of the top plays from the defensive back's college career.

The San Francisco 49ers general manager analyzed the selections of defensive back Ahkello Witherspoon and quarterback C.J. Beathard.

Here are five quick facts about the 49ers 2017 third round pick, Colorado defensive back Ahkello Witherspoon.

The San Francisco 49ers picked Colorado defensive back Ahkello Witherspoon with the No. 66 overall pick in the 2017 NFL Draft.

Watch 49ers third round pick Ahkello Witherspoon participate in drills at the 2017 NFL Scouting Combine.