Holy crap, you guys are just so dumb.
Difo is young and getting the starting job for the first time in his big league career. He knows that hes basically auditioning for the job next season.
The previous at bat, Difo had swung at three straight pitches, the last one at his eyes. So when he did it again and was rewarded, Martinez was looking to caution him against swinging for the fences.
Martinez was basically cautioning Difo from becoming Danny Espinosa and yall are taking pitchforks to him for it