It happened just before 6 p.m. Friday when a deputy was chasing a 16-year-old driver in northwest Harris County.
The teen suspect struck two other cars after he fled, according to the sheriff's office.
The driver of one of the vehicles struck was Wannenburg, who was pronounced dead.
Also in the car was his 8-year-old son, who is in critical condition with life-threatening injuries, according to Harris County Sheriff Ed Gonzalez.
Wannenburg played for the Vodacom Bulls and Springboks. He was based in Texas and coached the Austin Elite Rugby in the North American Major Rugby League. He was also the head coach of Rice University's rugby club.
The team's captain, Jacob Koelsch, described Wannenburg as a humble, selfless, dedicated athlete and father.
"He also coached his son's little league team and you probably don't have enough fingers to count the amount of coaching jobs he's had in the last year (or) year in a half, alone," Koelsch said. "He's just a very servant-minded person, very selfless. Very willing to give his time and his efforts."
The team set up a GoFundMe page to help Wannenberg's family.
The Brazos Little League Team along with members of the family's neighborhood, gathered Saturday night for a prayer vigil.
Mandi McDougal, who is assistant to the league's board, told ABC13 she visited Wannenburg's son at the hospital and said his condition was improving.
McDougal said the Wannenburg family was a tight-knit family that did everything together.
"They were such a sweet family that everybody knew them," McDougal said. "Everybody loved them. Even if they only met them a few times, because the impact they make as a family."
The Brazos Little League Team also started a GoFundMe to help the family with funeral expenses.
We are devastated at the passing of Vodacom Bulls legend Pedrie Wannenburg.— Official Blue Bulls (@BlueBullsRugby) April 23, 2022
Our heartfelt condolences go out to the Wannenburg family 🕊 pic.twitter.com/ePecg3nSYU
Meanwhile, deputies arrested the 16-year-old driver. He was taken to the hospital after the crash and was arrested for felony murder, reckless aggravated assault, and aggravated assault with a deadly weapon.