MOBILE, Ala. — North Carolina quarterback and 2022 NFL draft prospect Sam Howell said he learned some valuable lessons during his up-and-down final season with the Tar Heels. Speaking to media following his first practice of the 2022 Senior Bowl, Howell said playing with a collection of younger players molded him into a better leader while also maturing his on-field decision-making. “That’s kind of the main thing I learned throughout this past season. I don’t have to be the hero on every single play. Just stay with my framework and I stay true to who I am as a player,” Howell said. “I was chal…