If the Dallas Cowboys hire Scott Linehan as the playcaller, it would upset the current one, Bill Callahan. A source said Callahan would be opposed to a move and that he would contemplate his future with the Cowboys should it happen. Callahan, who is signed through the 2014 season, became the playcaller in 2013 when Cowboys owner/general manager Jerry Jones wanted to take those duties away from head coach Jason Garrett. When the source was asked would Callahan be happy with a potential change, the source said, "hell no." Callahan didn’t respond for comment. In 2013 the Cowboys finished 16th overall, 24th as a running attack and 14th in passing with Callahan calling the plays. Callahan, who has run the West Coast offense in the past, was making adjustments to calling plays in a timing-based offense, which is something the Cowboys have employed since 2007. Callahan had his struggles gaining the concepts with the offense, even delaying his vacation last year so he could make sure he had a command of things. Callahan had to not only deal with an offense he wasn't familiar with, but the increased involvement of quarterback Tony Romo, who became more active in game planning in 2013. Callahan was always complimentary of the chance to call plays, saying the Cowboys were running their offense and not Garrett's. However, it appears Garrett wasn’t happy with the results and is trying to make changes. At last week’s Senior Bowl practices, Garrett and Jones said Callahan would return but stopped short of saying what his duties would be. "I wouldn’t address any of that until we finalize everything and we're in the process of that," Cowboys executive vice president Stephen Jones said from the Senior Bowl last week.