Overview

• The 49ers defensive coordinator praised Liam Coen’s offense for using formations, motions and personnel to diagnose coverages and get into favorable plays.
• Saleh said the tactic involves on-field cues rather than any electronic methods, noting that sign-reading itself is permitted under NFL rules.
• He cited similar experiences facing Kevin O’Connell’s Vikings and Sean McVay’s Rams, calling this coaching tree particularly adept at identifying defensive tells.
• Jacksonville’s staff reflects those roots, with Coen coming from the Rams, Grant Udinski and Shaun Sarrett joining from Minnesota, and Shane Waldron bringing Rams experience.
• San Francisco is tightening signals and communication ahead of Week 4, with the Jaguars at 2-1 behind 356.3 yards and 23.3 points per game and 49ers QB Brock Purdy listed day-to-day after limited practices.