Travell Mazion Crash Report, Boxer Crossed Centerline While Speeding

Undefeated boxing star Travell Mazion was speeding around a curve when he crossed over the centerline and slammed head-on into oncoming traffic ... this according to the crash report obtained by TMZ Sports.

Mazion -- who was just 24 years old -- was fatally injured in the July 15 wreck in Travis County, Texas at around 9:40 p.m.

In the crash report ... cops say the weather was clear and the road was dry -- but they add it was a dark and not well-lit area.

Officers say in the report, Mazion was speeding as he entered into a curve in the roadway ... crossed the centerline, clipped a car and then crashed head-on into another vehicle.

The report doesn't say how fast Mazion was going ... but the cops say he WAS wearing a seatbelt.

According to the report, Mazion was pronounced dead just a few minutes after the crash. He was not tested for drugs or alcohol at the scene.

The driver of the other car -- a 61-year-old male -- was pronounced deceased at a local hospital hours later.

Mazion was 17-0 as a pro -- and most recently defeated Fernando Castaneda in San Antonio in January. He was considered a rising star in the sport, and was once backed by NFL All-Pro Von Miller.

Oscar De La Hoya's Golden Boy Promotions, which repped the fighter, said of Travell after the crash, "Mazion was a kind, charismatic young man who lit up every room he walked into and brought excitement to fans inside the ring."