Brad Keselowski

YY1 said
That's waht I thoght at first, but

1- brother is in a different series.

if he's in Nascar. theoretically he could drive in the big ones.

YY1 said
2- that doesn't explain the FULL name
Labonte's get T and B
Bush brothers get just enough caharters to identify KU and KY

If his other relatives all start with 'B' then that lets out the Labonte explanantion (obviously) and if his name's Brad and his brother's name is Brian then they'd have to use 'BRA' or 'BRD' and 'BRI' for Brad and Brian. If you have to use 'BRD' you might as well just use 'Brad'.

my $.03 Cdn lol.