The San Francisco 49ers and Jacksonville Jaguars face off in a huge game for both teams this weekend. On one side, the 49ers are undefeated thanks to a revitalized defense under Robert Saleh . The Jaguars, however, are 2-1 and attribute their success to an offensive overhaul under new head coach Liam Coen . He will match wits against Kyle Shanahan in Week 4 as he looks for a win.

Jacksonville has implemented new strategies this season that stand out. The Jaguars re-discovered Travis Etienne Jr. and have Trevor Lawrence back near his peak. However, Saleh faces a new challenge in Week 4. Throughout the first three games of the season, Coen and Jacksonville have discovered a way to steal signs from the opposing defense without breaking any rules.

Knowing what a defense is calling give

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