Fred Warner on new DC Raheem Morris: Have to welcome changes or get left behind

49ers linebacker Fred Warner is preparing for a new defensive era under coordinator Raheem Morris following the departure of Robert Saleh, who has taken the head coaching position with the Tennessee Titans. Warner, who missed the end of the 2025 season due to an ankle injury, expressed optimism about Morris's "infectious energy" and is open to potential changes in the defensive scheme. The 49ers have traditionally relied on a four-down lineman, cover-3 base defense, but Warner acknowledges the need to adapt to evolving league strategies. The success of Morris's adjustments may hinge on the health of key players like Warner and Nick Bosa, whose presence on the field could significantly impact the team's defensive performance.