By Tzvi Machlin There are a number of parallels between the careers of Baker Mayfield and Robert Griffin III. Today, RG3 decided to weigh in on the situation that his Heisman brother finds himself in. Taking to Twitter, Griffin pointed out that the Browns should have traded Mayfield before signing newly-acquired quarterback Deshaun Watson to his long-term deal. He said that the Browns now find themselves effectively stuck with him due to decisions they’ve made. “The Browns needed to trade Baker Mayfield before the ink dried on Deshaun Watson’s contract. Instead, they trashed Baker in the media…