(AP Photo/ Matthew Hinton)
Female NFL referee Sarah Thomas before an NFL preseason football game at the Mercedes-Benz Superdome in New Orleans, Friday, Aug. 16, 2013. (AP Photo/ Matthew Hinton)
Referee trainee Sarah Thomas, right, talks to Cleveland Browns equipment manager Brad Melland during a mandatory minicamp practice (AP Photo/ Mark Duncan)
Female NFL referee Sarah Thomas in the first half of an NFL preseason football game between the New Orleans Saints and the Oakland Raiders (AP Photo/ Matthew Hinton)
Female NFL referee Sarah Thomas works in the first half of an NFL preseason football game between the New Orleans Saints and the Oakland Raiders (AP Photo/ Jonathan Bachman)
Female NFL referee Sarah Thomas works the game in the second half of an NFL preseason football game between the New Orleans Saints and the Oakland Raiders (AP Photo/ Matthew Hinton)
Female NFL referee Sarah Thomas before an NFL preseason football game at the Mercedes-Benz Superdome in New Orleans, Friday, Aug. 16, 2013. (AP Photo/ Matthew Hinton)
Female NFL referee Sarah Thomas in the second half of an NFL preseason football game between the New Orleans Saints and the Oakland Raiders (AP Photo/ Matthew Hinton)
NFL referee Sarah Thomas walks on the field before an NFL preseason football game between the New Orleans Saints and the Oakland Raiders (AP Photo/ Jonathan Bachman)
NFL referee Sarah Thomas walks on the field before an NFL preseason football game between the New Orleans Saints and the Oakland Raiders (AP Photo/ Jonathan Bachman)
Sarah Thomas, right, walks off the field after a Cleveland Browns mandatory minicamp practice at the NFL football team's facility in Berea, Ohio (AP Photo/ Mark Duncan)
Sarah Thomas, right, talks with other officials at a Cleveland Browns mandatory minicamp practice at the NFL football team's facility in Berea, Ohio (AP Photo/ Mark Duncan)
Referee Sarah Thomas runs off after a mandatory Cleveland Browns minicamp practice at the NFL football team's facility in Berea, Ohio Thursday, June 12, 2014. (AP Photo/ Mark Duncan)
Female NFL referee Sarah Thomas in the second half of an NFL preseason football game between the New Orleans Saints and the Oakland Raiders (AP Photo/ Matthew Hinton)
NFL line judge Sarah Thomas #153 works the New Orleans Saints and Oakland Raiders game at the Superdome during an NFL preseason game in New Orleans (AP Photo/ Layne Murdoch)