Former All-Pro linebacker Isiah "Butch" Robertson was killed in a traffic accident southeast of Dallas on Thursday night, the Texas Department of Public Safety confirmed to NFL.com. He was 69.
Robertson, who played for the Los Angeles Rams from 1971-78 before ending his NFL career with the Buffalo Bills from 1972-82, died in a three-vehicle crash near Mabank, Texas, according to Lt. Lonny Haschel of the Texas Dept. of Public Safety.
A preliminary investigation determined that Robertson was driving a limousine in the rain at an unsafe speed around a curve before skidding and coming to a stop partially in the roadway, according to Haschel.
The limo collided with a truck and was pushed into an oncoming traffic lane, where it was struck by another vehicle.
Authorities did not provide updates on the conditions of other individuals involved in the crash, which remains under investigation.
The crash occurred a short time after Robertson was speaking at a high school football banquet nearby and took place a few miles from a drug and alcohol treatment center Robertson founded in Mabank.
Robertson was a four-time All-Pro selection and chosen to play in the Pro Bowl six times after the Rams selected him with the 10th overall pick of the 1971 NFL Draft out of Southern University. He helped the Rams win six straight NFC West titles from 1973-78.
Last year, Robertson was inducted into the Black College Football Hall of Fame.