He played six seasons with the Pittsburgh Steelers, Denver Broncos, Indianapolis Colts, Dallas Cowboys, and New Orleans Saints.

He also spent time in training camp or on practice squads with the Buffalo Bills, Oakland Raiders, Miami Dolphins, Carolina Panthers, Baltimore Ravens, and Detroit Lions.

Though born in Dallas, Hills grew up in Houston, where he was an All-State tight end and Parade All-American at Alief Elsik High School.

[2][3] During Hills' senior year, he was rated by some scouting services as the top tight end prospect in the country, and he committed to play college football at Texas.

During that game, Hills suffered a severe injury to his peroneal nerve and was told that he might not be able to play football again.

[4] Hills attended the University of Texas, where he was forced to redshirt the 2003 season after reconstructive surgery on his left knee following a career-threatening injury (nerve damage).

[5] Nonetheless, that season he made the Walter Camp All-American team, was on the Outland Trophy watch list and was a first-team All-Big 12 selection.

[18] A few weeks after being cut by the Panthers, Hills was signed by the Baltimore Ravens to their practice squad, but was released after 5 days.

[20][10] On October 6, 2015, shortly after being cut by the Ravens, Hills signed with the New Orleans Saints, his tenth team of his NFL career.

[27] Hills' younger brother Jeremy also attended Alief Elsik, and played running back at the University of Texas.