Taveras was reportedly driving the car at the time of the crash. He was 22.
"Obviously, we have deep condolences to his family," Cardinals general manager John Mozeliak said. "We are still waiting for more details before issuing a full statement."
According to MLB.com, there are no other details available about Taveras' death.
Taveras made his major league debut for the Cardinals on May 31, 2014. He played in 80 games, batted .239 and hit three home runs. The outfielder was the third ranked prospect in Major League Baseball by Baseball America.
On Oct. 12, Taveras hit a game-tying home run in Game 2 of the National League Championship Series against the San Francisco Giants. The Cardinals won the game, 5-4, but lost the series in five games.
Taveras was born in Puerto Plata, which is the place he was traveling to at the time of his death. Taveras also has a Canadian passport, and thought about playing for Team Canada in the 2012 World Baseball Classic. He stayed with the Cardinals in spring training instead.
Taveras' teammates and other players sent out messages about the rookie.
Absolute Tragedy.. My prayers go out to Oscar Taveras family.— Matt Carpenter (@MattCarp13) October 27, 2014
R.I.P. Oscar Taveras.. Nos deja un tremendo talento que apena epesaba a florecer... Que Dios te tenga en la gloria, paz a sus restos/Today a tremendous talent that was just starting to flourish has left us, God have you in his glory. #oscartaveras #ElFenomeno
A photo posted by Carlos Gomez (@c_gomez27) on
Tragic news about oscar and girlfriend. Prayers for both families. His influence on his teammates and the organization won't be forgotten.— Trevor Rosenthal (@TrevRosenthal) October 27, 2014
So sad to hear about Oscar. My prayers go out to his family. In complete shock.. So sad.. Life isn't fair— Randal Grichuk (@RGrich15) October 27, 2014
Horribly saddened by the news on amazing Cardinals outfielder Oscar Taveras. Praying for strength for his family, friends, & teammates.— Russell Wilson (@DangeRussWilson) October 27, 2014