You can't include a list of all-time Vols without including a running back who is considered the best in Houston Texans franchise history. While the Texans are still a young franchise, Arian Foster put together a great career with the Texans.
Foster finished his career with 6,527 rushing yards and 54 rushing touchdowns. He led the league in rushing yards and touchdowns in 2010 and rushing touchdowns in 2012. This earned him four Pro Bowl appearances and one First-Team AP All-Pro selection.
While Foster only played seven seasons in the NFL, he immediately made an impact in Houston and will be remembered for that. He helped the Texans make four playoff appearances in his seven seasons and sits at the top of Houston's all-time leading rushers list with more than double Domanick Williams' rushing numbers, who sits in second place.