The campaign updated the GOP nominee's cover photo on Facebook to a rainy photo with the text "Clear Eyes. Full Heart. Can't Lose," the motto used by Coach Taylor of the fictional Dillon Panthers football team on the TV show "Friday Night Lights."

Romney's prominent use of the motto follows his endorsement by Buzz Bissinger, the journalist who wrote the book that inspired the show.

Bissinger, last week wrote an op-ed for The Daily Beast explaining his decision, as a self-identified "lifelong Democrat," to vote for Romney, saying the "tipping point" was the president's performance in last week's debate.

But it is not the first time the memorable motto has played a role in national politics. President Obama's campaign-managed Twitter account posted a popular tweet last May that included a photo of the president tossing a football at Soldier Field in Chicago with the words "Clear eyes, full hearts."

Josh Romney, one of the Romneys' five sons, also tweeted a photo of Mitt and Ann Romney in front of a "Clear eyes, full hearts, can't lose" sign at the University of Denver after the presidential debate there last week.

The coach theme is particularly appropriate for Romney's campaign, as the candidate has used a running football metaphor in his stump speech since football season started last month. Romney has compared Obama to a coach on a losing streak.

"Let me tell you, if you have a coach that's 0-23 million, you say it's time to get a new coach. It’s time for America to see a winning season again and we're going to bring it to them,” he said last month.