Travis Mack, car chief for Dale Jr., delivers baby girl at home

Travis Mack, the car chief for Dale Earnhardt Jr., makes a living building fast race cars.

Apparently, he's more than capable of playing doctor, too.

Mack delivered his baby daughter at 3:15 a.m. ET on Wednesday in a bathroom at the family's home.

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I delivered my baby girl at 3:15 this morning in our bathroom! Amazing experience. #GodIsGood My Wife is so strong.

— Travis Mack (@T_Mack88) February 3, 2016

Well done, dad.