The San Francisco 49ers have welcomed back Robert Saleh as their defensive coordinator after nearly four years as the head coach of the New York Jets. Saleh previously made a significant impact with the 49ers, particularly during their Super Bowl run in 2019, when they showcased a formidable defense under his leadership. His return comes at a crucial time, as the 49ers aim to rebound from a disappointing season, looking to leverage his expertise to restore defensive dominance.