Sherman and Brandon Browner returned as the starting cornerbacks alongside safeties Earl Thomas and Kam Chancellor.
On September 29, 2013, Sherman made four solo tackles, two pass deflections, and returned an interception for a touchdown as the Seahawks' defeated the Houston Texans 23–20 in a comeback victory.
Sherman intercepted a pass by quarterback Matt Schaub, that was intended for tight end Owen Daniels, and returned it for a 58-yard touchdown in the fourth quarter to tie the game 20–20 which sent it into overtime.
In Week 15, he made two combined tackles, a season-high three pass deflections, and intercepted two passes by quarterback Eli Manning in a 23–0 win at the New York Giants.
The following week, he recorded a season-high eight combined tackles, deflected two passes, and intercepted two passes by quarterback Carson Palmer during a 17–10 loss to the Arizona Cardinals in Week 16.
On December 27, 2013, it was announced that Sherman was voted to the 2014 Pro Bowl, marking the first Pro Bowl selection of his career.
He finished the season with 48 combined tackles (38 solo), 16 pass deflections, eight interceptions, and a touchdown in 16 games and 16 starts.
He was voted to the Associated Press NFL All-Pro First Team for the second consecutive season.
Sherman received an overall grade of 87.8 from Pro Football Focus in 2013.

The Legion of Boom allowed the fewest passing yards in the league and the Seahawks had the top ranked defense in 2013.
The Seattle Seahawks finished first in the NFC West with a 13–3 record and earned a first round bye.
The Seahawks reached the NFC Championship after defeating the New Orleans Saints 23–15 in the NFC Divisional Round.
On January 19, 2014, Sherman made two combined tackles and a pass deflection as the Seahawks defeated the San Francisco 49ers 23–17 in the NFC Championship Game.
He played a critical role and deflected a pass by quarterback Colin Kaepernick, that was intended for Michael Crabtree, which was caught by teammate Malcolm Smith to seal the Seahawks' 23–17 victory.

The play was later dubbed "the Immaculate Deflection" (as an homage to the Immaculate Reception), and would later be voted by Seahawks fans to be the most significant play in franchise history.
After the play, Sherman ran over to Crabtree and mockingly offered a handshake with Crabtree responding by shoving Sherman in his facemask.
Sherman proceeded to make a choke sign towards Kaepernick and was immediately penalized by the officials for unsportsmanlike conduct.
The NFL went on to fine Sherman $7,875 for his taunting directed towards Kaepernick.

"Well, I'm the best corner in the game!
When you try me with a sorry receiver like Crabtree, that's the result you gonna get!
Don't you ever talk about me!
Don't you open your mouth about the best, or y'know I'm gonna shut it for you real quick!
L.O.B.!"

— Sherman speaking about Michael Crabtree during a post-game interview on Fox Sports with Erin Andrews after the Seahawks' victory in the NFC Championship Game
Sherman's rant was the subject of scrutiny by fans and the media, some of whom deemed him a "thug".
He later blamed Crabtree's shove for fueling his post-game rant, though he also said he regretted his attack and was dismayed by the negative response from the public.
In response to the word "thug" being widely used to criticize Sherman following the incident, Sherman said "The reason it bothers me is because it seems like it's an accepted way of calling somebody the N-word now."

On February 2, 2014, Sherman started in Super Bowl XLVIII and made three combined tackles and a pass deflection as the Seahawks defeated the Denver Broncos 43–8.
He held wide receiver Eric Decker to one reception for a total of six-yards during the game.
Sherman and Brandon Browner returned as the starting cornerbacks alongside safeties Earl Thomas and Kam Chancellor. On September 29, 2013, Sherman made four solo tackles, two pass deflections, and returned an interception for a touchdown as the Seahawks' defeated the Houston Texans 23–20 in a comeback victory. Sherman intercepted a pass by quarterback Matt Schaub, that was intended for tight end Owen Daniels, and returned it for a 58-yard touchdown in the fourth quarter to tie the game 20–20 which sent it into overtime. In Week 15, he made two combined tackles, a season-high three pass deflections, and intercepted two passes by quarterback Eli Manning in a 23–0 win at the New York Giants. The following week, he recorded a season-high eight combined tackles, deflected two passes, and intercepted two passes by quarterback Carson Palmer during a 17–10 loss to the Arizona Cardinals in Week 16. On December 27, 2013, it was announced that Sherman was voted to the 2014 Pro Bowl, marking the first Pro Bowl selection of his career. He finished the season with 48 combined tackles (38 solo), 16 pass deflections, eight interceptions, and a touchdown in 16 games and 16 starts. He was voted to the Associated Press NFL All-Pro First Team for the second consecutive season. Sherman received an overall grade of 87.8 from Pro Football Focus in 2013.
The Legion of Boom allowed the fewest passing yards in the league and the Seahawks had the top ranked defense in 2013. The Seattle Seahawks finished first in the NFC West with a 13–3 record and earned a first round bye. The Seahawks reached the NFC Championship after defeating the New Orleans Saints 23–15 in the NFC Divisional Round. On January 19, 2014, Sherman made two combined tackles and a pass deflection as the Seahawks defeated the San Francisco 49ers 23–17 in the NFC Championship Game. He played a critical role and deflected a pass by quarterback Colin Kaepernick, that was intended for Michael Crabtree, which was caught by teammate Malcolm Smith to seal the Seahawks' 23–17 victory.
The play was later dubbed "the Immaculate Deflection" (as an homage to the Immaculate Reception), and would later be voted by Seahawks fans to be the most significant play in franchise history. After the play, Sherman ran over to Crabtree and mockingly offered a handshake with Crabtree responding by shoving Sherman in his facemask. Sherman proceeded to make a choke sign towards Kaepernick and was immediately penalized by the officials for unsportsmanlike conduct. The NFL went on to fine Sherman $7,875 for his taunting directed towards Kaepernick.
"Well, I'm the best corner in the game! When you try me with a sorry receiver like Crabtree, that's the result you gonna get! Don't you ever talk about me! Don't you open your mouth about the best, or y'know I'm gonna shut it for you real quick! L.O.B.!"
— Sherman speaking about Michael Crabtree during a post-game interview on Fox Sports with Erin Andrews after the Seahawks' victory in the NFC Championship Game
Sherman's rant was the subject of scrutiny by fans and the media, some of whom deemed him a "thug". He later blamed Crabtree's shove for fueling his post-game rant, though he also said he regretted his attack and was dismayed by the negative response from the public. In response to the word "thug" being widely used to criticize Sherman following the incident, Sherman said "The reason it bothers me is because it seems like it's an accepted way of calling somebody the N-word now."
On February 2, 2014, Sherman started in Super Bowl XLVIII and made three combined tackles and a pass deflection as the Seahawks defeated the Denver Broncos 43–8. He held wide receiver Eric Decker to one reception for a total of six-yards during the game.
Richard Sherman (American football)