Jake Lynch is entering his second season with the 49ers as a defensive quality control coach. He joined the 49ers after spending the 2024 season as a defensive graduate assistant at the University of Washington.

In his first season with the 49ers, Lynch helped the 2025 defensive unit finish the season ranked fifth in fumble recoveries (nine), 11th in opponent rushing yards per game (107.8) and 13th in opponent points per game (21.8). Working specifically with the team's defensive backs, he helped see S Ji'Ayir Brown and DB Deommodore Lenoir register two interceptions each, which were tied for the team lead. He also helped CB Renardo Green lead the team with 10 passes defensed, marking his second-consecutive season with at least 10 passes defensed. Lynch also worked closely with rookie CB Upton Stout, helping him finish the season with 82 tackles, five passes defensed and 1.0 sack. Stout's 82 tackles were the third-most on the team and seventh-most among rookies in the NFL.

Jake Lynch is entering his second season with the 49ers as a defensive quality control coach. He joined the 49ers after spending the 2024 season as a defensive graduate assistant at the University of Washington.

In his first season with the 49ers, Lynch helped the 2025 defensive unit finish the season ranked fifth in fumble recoveries (nine), 11th in opponent rushing yards per game (107.8) and 13th in opponent points per game (21.8). Working specifically with the team's defensive backs, he helped see S Ji'Ayir Brown and DB Deommodore Lenoir register two interceptions each, which were tied for the team lead. He also helped CB Renardo Green lead the team with 10 passes defensed, marking his second-consecutive season with at least 10 passes defensed. Lynch also worked closely with rookie CB Upton Stout, helping him finish the season with 82 tackles, five passes defensed and 1.0 sack. Stout's 82 tackles were the third-most on the team and seventh-most among rookies in the NFL.

In 2024, Lynch worked under Washington head coach, Jedd Fisch, and defensive coordinator, Steve Belichick. The Huskies defense ranked second in the nation in average passing yards allowed (377.0), and 28th in total yards allowed (4,269).

A native of Del Mar, CA, Lynch played linebacker at Stanford University for five seasons (2018-22) where he appeared in 16 games and registered three tackles. A three-time Pac12 Fall Academic Honor Roll (2019-21) student, Lynch was named the Cardinal's 2019 Greg Piers Award recipient, which is given to the most outstanding offensive, defensive, and special teams scout team players of the year.

Lynch earned a bachelor's degree in science, technology and society along with his master's degree in communication and media studies from Stanford. He is the son of current 49ers President of Football Operations/General Manager and Pro Football Hall of Famer, John Lynch.