J. D. Martinez talks swing overhaul, trade from Astros with Alex Rodriguez, MLB on ESPN

J. D. Martinez and Alex Rodriguez chat while walking around the warning track at Fenway Park. They discusses Martinezs lowest point in 2014 after he was released by the Astros and how hes now become one of the best hitters in baseball. Subscribe to ESPN on YouTube: Subscribe to ESPN FC on YouTube: Subscribe to NBA on ESPN on YouTube: Watch ESPN on YouTube TV: ESPN on Social Media: Follow on Twitter: Like on Facebook: Follow on Instagram: Visit ESPN on YouTube to get uptotheminute sports news coverage, scores, highlights and commentary for NFL, NHL, MLB, NBA, College Football, NCAA Basketball, soccer and more. More on