Philly is perfect place for Mark Sanchez to steal starting job

After Kevin Kolb's injury in 2012, Mike Vick took hold of the Eagles' starting job. When Vick went down the following year, it was Nick Foles' turn to step up. Now that Foles is out with a broken collarbone, Mark Sanchez has an opportunity to stick at quarterback for a team that has made a habit of replacing opening-day starters. ProFootballTalk's Mike Florio takes a look at the precedent that has been set in Philadelphia concerning job security and whether Sanchez has a legitimate chance to leapfrog Foles as the Eagles' quarterback of the future.