 Emmel was named a crew chief in February 2017 by MLB; he is joined on his 2017 crew by Brian O'Nora, Quinn Wolcott, and Scott Barry.Prior to reaching the major leagues in 1999, Emmel worked in the New York–Penn League (1992–1993), South Atlantic League (1994), California League (1995), Florida State League (1996), Eastern League (1996–1997), and International League (1998).Emmel ejected Atlanta Braves manager Bobby Cox from Game 2 of the 2010 NLDS for disputing an out call on the grounds that San Francisco Giants first baseman Aubrey Huff had come off of first base.