Pittsburgh coach Mike Tomlin expects San Diego running back LaDainian Tomlinson to be in the backfield on Sunday when the two teams do battle. Tomlinson left the Chargers' 23-17 overtime win over Indianapolis last Saturday and doesn't know if he'll be able to play against the Steelers. "Guys like him defy the odds," Tomlin said Tuesday at his weekly news conference. "That's why he is who he is." Pittsburgh will prepare this week as if Tomlinson will play.