The Arizona Cardinals re-signed running back Chris Johnson. Does it mean anything for David Johnson? What does Mike Williams’ injury mean for Tyrell Williams? David Johnson Cardinals are giving 31-year-old RB Chris Johnson a one-year deal. — Adam Schefter (@AdamSchefter) July 20, 2017 While re-signing a 31-year-old RB may not seem like a huge threat to someone as talented as David Johnson, it may be more of an issue than you think....