Kyle Kosier is a former American football player who played as an offensive guard in the National Football League (NFL). He began his football career at Arizona State University, where he played for four years and was named to the All-Pac-10 team twice.

Kosier was signed as an undrafted free agent by the San Francisco 49ers in 2002. He spent two seasons with the team, playing in 15 games and starting in two. In 2004, he was signed by the Detroit Lions, where he played for one season before being released.

In 2005, Kosier signed with the Dallas Cowboys, where he spent the majority of his career. He played for the Cowboys for six seasons, starting in 82 games and playing in a total of 90. During his time with the Cowboys, Kosier was known for his versatility, as he played both guard positions and even filled in at center when needed.

In 2011, Kosier signed with the Buffalo Bills, where he played in 12 games and started in 10. He retired from the NFL after the 2011 season, having played in a total of 137 games and starting in 116.

Throughout his career, Kosier was known for his toughness and work ethic. He was a reliable player who rarely missed games due to injury. He was also respected by his teammates and coaches for his leadership and professionalism.

After retiring from football, Kosier returned to Arizona State University to complete his degree in business. He currently works as a financial advisor and is involved in various charitable organizations.

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