NASCAR Xfinity Series driver Cole Custer is officially a new father. On Sunday, Custer went to X to announce the birth of his first child with his wife Kari. “Callahan Brian Custer Very thankful to welcome a healthy baby boy and my wife Kari was amazing through the whole process,” Custer wrote. “It’s been a great Olympic Break!” According to TobyChristie.com, Custer met his wife through a mutual friend in 2019. The couple began dating and were married in January 2023. Custer and Kari announced they were expecting their first child in February. It’s been an exciting few weeks for Custer, the de…