On April 22, 1970, Yarbrough suffered head injuries while doing tire tests for Goodyear at
Texas World Speedway. Yarbrough blew a tire between turns three and four and impacted the wall at over 160 mph. Yarbrough's head hit a roll bar inside the cockpit with such force that it cracked his helmet. He was released from the hospital that evening, and at the time, was not believed to have had a serious head injury. He was picked up at the airport by
Cale Yarborough, but later had no memory of the crash, hospital, or meeting with Yarborough. "I was unconscious for about an hour, but I feel okay today," Yarbrough said a day later. "As tightly as I was strapped in the seat, it's hard for me to believe my body moved that much. The straps made my shoulders black and blue and I'm pretty sore." Yarbrough showed well in a few
championship car starts in 1970, leading the
inaugural California 500 at
Ontario Motor Speedway late. Yarbrough was a last-minute entry after
Jack Brabham's late withdrawal. After Al Unser retired with 14 laps remaining, Yarbrough inherited the lead. With a margin of two laps over second place, it appeared that Yarbrough would score an unlikely victory. But with eight laps remaining, Yarbrough suffered a broken piston and blew an engine, coasting to a stop in turn four. Yarbrough drew cheers from the crowd as he pushed his car back to the pits. Yarbrough then finished 3rd at
Trenton Speedway in 1971. After competing in three
Indianapolis 500s in 1967, '69 and '70, Yarbrough was driving a Dan Gurney Eagle in practice on May 9 for the
1971 Indianapolis 500 when he spun and crashed hard in turn one, suffering head injuries. Cale Yarborough was at the track hospital when LeeRoy was brought in. "He was burned on the hands and neck, and he was woozy from another lick on the head. He was the palest live man I've ever seen." Yarbrough had an alcohol problem and would sometimes collect empty bottles on the side of the road for the bottle deposits which he would use to buy beer. The alcohol abuse further irritated his brain damage. On Wednesday, February 13, LeeRoy spent most of the day in bed, with his mother bringing him food. Terry Sweat, Minnie's grandson, had left the house to buy her cigarettes. While doing the dishes after dinner, LeeRoy entered the kitchen and remarked about his mouth, saying "'Mama, look how you've cut my mouth!' I said, Son, I haven't done anything to your mouth. Your mouth is all right.' LeeRoy opened his mouth. I looked at it. It was not cut." He left the kitchen and returned shortly, saying, "Mama, I'm going to do something, and I don't want to do it. I'm going to kill you." Yarbrough would proceed to strangle his mother. Terry Sweat returned and struck Yarbrough with a jelly jar until he released his mother. When police arrived, LeeRoy struck an officer in the face and needed several firefighters to subdue him. Junior Johnson was also prepared to give Yarbrough a job. Unfortunately, staff at the facility determined Yarbrough's brain damage was too severe for treatment and he returned to a Florida facility. ==Death==