J.D. Martinez Gives Fascinating Insight On How He's Fixing His Swing
How J.D. Martinez transformed an awkward swing into an elite one - The Boston Globe
Yasiel Puig hits three home runs for Dodgers
Why JD Martinez Changed His Swing
D-backs' J.D. Martinez hits four home runs
JD Martinez Swing Feels
What's wrong with J.D. Martinez, and how to fix it - Bless You Boys
How J.D. Martinez transformed an awkward swing into an elite one - The Boston Globe
How J.D. Martinez went from struggling Astro to fierce Tiger
J.D. Martinez on changing swing, 01/24/2016
MLB: Five unlikely players take different paths to first All-Star Game
With Home Run No. 5,694, Baseball Sets a Record With Time to Spare - The New York Times