Hyun-jin Ryu
Campbell was promoted to the Mets from Las Vegas on May 10, 2014, in what his father Hugh described as a "glorious weekend". He made his debut batting against the Philadelphia Phillies in the bottom of the sixth inning pinch-hitting for Lucas Duda with the bases loaded, hitting a sac-fly to right fielder Marlon Byrd on a 1–0 count driving in Daniel Murphy for his first major league RBI off pitcher Jake Diekman. On May 11, Campbell got his first major league hit, a single in the bottom of the fourth inning off pitcher Cole Hamels. On May 21, he hit his first major league homerun, a two-run home run off Los Angeles Dodgers' pitcher Hyun-jin Ryu.