Bob Costas Makes 'Justin Bieber' Gaffe During Shane Bieber Outing

Bob Costas calls Guardians pitcher 'Justin Bieber,' has great reaction – NBC Sports Chicago

WATCH: Bob Costas Calls Guardians Pitcher Shane Bieber 'Justin Bieber

MLB world roasts Bob Costas' hilarious Justin Bieber gaffe

Justin Bieber just threw his 84th pitch - Emmy Award-winning sportscaster Bob Costas hilariously slips up, calls All-Star Shane Bieber, pop star Justin Bieber

Bob Costas makes' Justin Bieber' Blunder (gaffe) during Shane bieber's outing.#justinbieber #hailey

Shane Bieber

Bob Costas calls Guardians ace Shane Bieber 'Justin Bieber

Bob Costas Makes Cringeworthy Justin Bieber Gaffe, Digs Deeper Hole

Bob Costas

Justin Bieber is named at the baseball in commentator blunder

Bob Costas makes' Justin Bieber' Blunder (gaffe) during Shane bieber's outing.#justinbieber #hailey

Bob Costas stunned after mistaking Justin Bieber & Shane Bieber

Guardians-Yankees: Bob Costas accidentally calls Shane Bieber 'Justin

Bob Costas: Breaking News, Rumors & Highlights

TMZ Live -- Marlon Wayans in the House!