Blake M. Treinen (/ˈtraɪnɛn/, born June 30, 1988) is an American professional baseball pitcher for the Los Angeles Dodgers of Major League Baseball (MLB). He played college baseball for the Baker Wildcats and the South Dakota State Jackrabbits baseball team. The Oakland Athletics selected Treinen in the seventh round of the 2011 MLB draft, and he made his MLB debut in 2014. He has also played in MLB for the Athletics and Washington Nationals . Treinen was an All-Star in 2018 and won the 2020 World Series with the Dodgers over the Tampa Bay Rays.