The Tennessee Titans' offense has been a disaster through four games. However, ahead of Week 5, the Titans will receive a major boost for their upcoming matchup with the Arizona Cardinals, with running back Tyjae Spears set to return from injury. After he missed the mandatory four games, the Titans have activated the running back off injured reserve for Week 5, ESPN's Adam Schefter reported. The Titans' run game has been hot-and-cold thus far, with Tony Pollard alternating good and bad games through the first month. Article Continues BelowTitans expect Tyjae Spears back in Week 5After four games, the Titans are one of just three teams that remain winless.