DAVIDSON, N.C. — Before J.J. Watt and Drew Brees discovered him, before he thanked Oprah Winfrey and Winston Churchill, before his social media post declaring himself eligible for the 2024 NFL draft was viewed nearly 10 million times, Barclay Briggs was an obscure backup center at Davidson College. More precisely, Briggs was an obscure backup center who was very smart and had a wicked sense of humor. In reality, he knew there was no chance that he would ever make the NFL — he only started three games in his career for the non-scholarship Davidson Wildcats. But, he thought: What if? What if som…