By Andrew McCarty Late Tuesday night, quarterback Baker Mayfield penned what seemed to be a goodbye letter to fans of the Cleveland Browns. “I have given this franchise everything I have,” he said on Twitter. “That is something I’ve always done at every stage, and at every level. And that will not change wherever I take my next stop. Whatever happens.. I just want to say thank you to the fans who truly embraced who I am and the mentality that aligned so well with this city’s hard working people.” The Browns met with Houston Texans quarterback Deshaun Watson about a potential trade, which clear…