Rubuta ci gaba don wannan sakin layi - A farkon farawarsa na 2013 a ranar 2 ga Afrilu, Bumgarner ya jefa innings takwas a kan Dodgers kuma ya kara da RBI a cikin nasarar 2 <unk> 0. A kan Braves a ranar 11 ga Mayu, yana da mafi girman kakar wasa 11, yana karɓar nasara a cikin nasara 10 zuwa 1. An zabi Bumgarner don wakiltar National League don 2013 Major League Baseball All-Star Game
, zabinsa na farko a All-Star. Kodayake a cikin jerin sunayen, ba a yi amfani da shi ba a cikin asarar NL ta 3<unk>0 ga AL. A ranar 27 ga Yuli, ya riƙe Cubs ba tare da ci ba har sau takwas amma ya sami rashin yanke shawara a cikin asarar 1-0. Ya yi daidai da lokacinsa mafi girma a strikeouts tare da 11 a ranar 2 ga Agusta a cikin nasara 4 zuwa 1 a kan Tampa Bay Rays.