A video of the victim's mother who remains in Cuba was also played in court.
"She believes in justice and asks for justice to be served so I ask all of those present and your honor for justice to be served in the memory of my father," Hernandez Jr. said.
A jury in October found Lyle guilty of manslaughter in the 2019 road rage incident that left the 63-year-old Hernandez dead.
A security camera video showed Lyle rushing up to Hernandez and punching him in the face. Hernandez died after hitting his head on the pavement.
"That Mr. Hernandez lost his life because of something I did, something that walks with me, it haunts me when I go to bed and it's still there when I wake up," Lyle said. "I never wanted any of this to happen, I never in my wildest dreams could have imagined something like this could have happened, that life could be lost and so many others affected so drastically in just a matter of seconds and just one punch."
Defense attorneys argued that Hernandez started the incident when he got out of his car and pounded on the window of the car Lyle was riding in at an intersection.
They also argued that Lyle was defending his family against what he thought was a threat posed by Hernandez.
"I'm so very sorry from the bottom of my heart," Lyle said. "I truly thought I was protecting my family."
But prosecutors said Hernandez had walked away and was heading back to his car before the punch. They also said that three witnesses testified that Hernandez had his hands up in a defensive posture and that there was no reason for Lyle to hit him at that point.