Aside from the quitting and the injury, lets focus on Ortiz defense..

He needs to start bobbing and weaving side to side like iron mike tyson and throw some explosive straight rights to the body and a left hook to the head as a finish. You he fights as a south paw right?

He kept retreating in a straight line, and Lopez continuously caught him right at the end of shots when he did this. When Ortiz had his head down, Lopez would blast him with uppercuts. Ortiz presented a stationary target and thought that his power would be able to finish Lopez, but he was dead wrong. Some of his best work in the fight was when he utilized the jab, and it helped him anticipate some of Lopez's offense. When he stopped throwing it, Lopez would throw a combo and land the majority of the punches, over and over again. Ortiz would absorb a combination and then try to answer back, but then he would get clinched. Or, he would try to counter during Lopez's combos, which would leave him open to get hit again. He was getting hit way too frequently, there were periods of time in the fight where Lopez couldn't miss a shot, Ortiz was right there in punching range to get punched lol

He needs to start bobbing and weaving side to side like iron mike tyson and throw some explosive straight rights to the body and a left hook to the head as a finish.

Ortiz was fine when he boxed. His real problem was the same as Bradley v Pacquiao, he kept trying to trade with an opponent who had much faster hands.

When he backs up he's useless, literally. He's pretty much a punching bag when he backs up.