In wrestling, he was a three-time zone champion and also won the state championship at 215 lbs.

As a true freshman, he started the last four games at offensive tackle and contributed to running back Chance Kretschmer becoming the nation's leading rusher with 1,732 yards.

As a senior, he was named to the Outland Trophy and Lombardi Award watch lists in July, prior to the start of the 2004 season.

[3] Dahl was signed as an undrafted free agent by the Dallas Cowboys after the 2005 NFL draft on April 28.

He made the regular-season roster, but was declared inactive for 9 games and was active but did not play in three others.

In 2009, he started 11 games, missing 6 contests with an Achilles' tendon and an ankle injury he suffered against the Tampa Bay Buccaneers.

He was named the starter at right guard over the incumbent Adam Goldberg and played in 16 games.

into referee Jerome Boger's open microphone as he was announcing the holding penalty to the crowd.

Boger further assessed an unsportsmanlike conduct penalty and Dahl had to later apologize for the incident.

In 2012, he started 14 games at right guard, before suffering a torn bicep against the Minnesota Vikings.