Johnson spoke on the phone with Busch two weeks ago and said it was "really special" to hear Busch talk about his son, Brexton.

Kyle Busch made a comment about his son, Brexton's, potential future NASCAR career before his sudden passing.

Kyle Busch, 41, died suddenly on Thursday after being hospitalized with an illness, according to his team.

Johnson spoke on the phone with Busch two weeks ago and said it was "really special" to hear Busch talk about his son, Brexton.