J.D. Martinez on his hitting mentality
From castoff to 'King Kong' -- How J.D. Martinez became one of MLB's most sought-after sluggers - ESPN
Bobby Dalbec getting hitting advice from J.D. Martinez
Who is J.D. Martinez? – Sun Sentinel
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Mariners can't beat Dodgers to take advantage of chance to climb in AL West
J.D. Martinez, Freddie Freeman bring contrasting styles to fuel a hot Dodgers offense - The Athletic
J.D. Martinez situation highlights Red Sox' muddied future at designated hitter – NBC Sports Boston
Will swing change lead to breakout year for Detroit Tigers' JaCoby Jones?
J.D. Martinez and the art and science of the swing
Dodgers plans for J.D. Martinez likely impacting Will Smith
How Mookie Betts built a better swing: an excerpt from The MVP Machine.
Swing Kings: The Inside Story of Baseball's Home Run Revolution: Diamond, Jared: 9780062872104: : Books
MLB playoffs: Boston's Mookie Betts, J.D. Martinez hitting unicorns