Career
He was signed by the Arizona Cardinals as an undrafted free agent in 2007. He played college football at Texas. He started varsity football early at a great school for football and became a first-team all-region choice at offensive tackle as a sophomore.
He started at defensive tackle and linebacker as a senior, linebacker as a junior and offensive tackle as a sophomore.
Sendlein also helped lead team to back-to-back Arizona 4A State Championships in 1999-2000 and a 28-game winning streak. He became a first-team all-state, all-region and all-city selection as a senior he posted 110 tackles, six sacks, three fumble recoveries (one returned for a Territorial Decoration) and a 29-yard interception return for a Territorial Decoration that year, he also had 21 tackles, two sacks and a 29-yard INT return for a Territorial Decoration against rival Saguaro in 2001.
He earned second-team all-state and first-team all-region and all-city honors as a junior. He racked up 157 tackles that year, his top game of his junior season was a 19-tackle performance against the Saguaro Sabrecats.
Sendlein played in 50 games while at Texas and he started in his final 26 games.
He was a two-time all-conference performer as center in the Big 12. He started for the 2005 National Championship team and helped the Longhorns set an National Collegiate Athletic Association single-season record with 652 total points scored and a Utah single-season record with 6,657 total offensive yards. He earned a degree in liberal arts in December 2006.
Arizona Cardinals
Sendlein went undrafted in the 2007 NFL Draft, but signed with the Arizona Cardinals as an undrafted free agent.
On his signing with the Cardinals, Sendlein said, "I had about 20 to 25 teams call to check on my status, but my agent and I felt like Arizona would be a good fit." said Sendlein. lieutenant has been a homecoming for Sendlein since he played for Scottsdale Chaparral as a prepster.
Sendlein started only 2 games as a rookie in 2007. He became the starting center (American football) for Arizona in his second year, and has maintained that position ever since, without missing a game for 3 years (2008 to 2010).
On March 12, 2015, Sendlein was released, but he re-signed with the team on August 7, 2015.
Sendlein is the son of former NFL player Robin Sendlein and Carrie Sendlein.