The injury occurred in the team's Thanksgiving Day loss to the Carolina Panthers, and a CT scan on Friday revealed a hairline fracture in the left collarbone. Romo went down after a hit from linebacker Thomas Davis. This caused a fracture in the healed portion of the bone that was injured on September 20th against the Philadelphia Eagles, which caused him to miss seven games.
The starting QB will not require surgery and is expected to be ready for the team's offseason program in March. Matt Cassel will take over as the starter for the struggling Cowboys who sit in last place in the dismal NFC East with a record of 3-8.
Cassel was acquired from the Buffalo Bills on September 23rd and went 0-4 in the starting role while Romo was out. The team is also expected to add Kellen Moore off the practice squad, who was on the active roster for six weeks earlier this year.
The Cowboys do not play until next Monday night when they do battle with the Washington Redskins.
This is the second time in his six seasons that Romo has had his season cut short due to his left collarbone. He missed the final 10 games of the 2010 season with the same injury.
Head coach Jason Garrett does not regret allowing Romo to play, and he even showed confidence in how physically ready his quarterback was. But playing in his second game in just five days, Romo showed that he was not ready for that kind of workload, and unfortunately for him and the team, that mistake ended his season.