Edmundo "Eddie" Diaz is firefighter at the 118 in Los Angeles. Originally from Texas, Eddie was a combat medic in the United States army, and moved to Los Angeles with his son, Christopher, after being discharged. 

Eddie Diaz is played by Ryan Guzman. 

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9-1-1 Quotes

Athena: Hey, you do not get to choose who lives and who dies.
Buck: Really, because I was under the impression that kind of was my job.

Come on, Bobby, see the fire, put out the fire, the rest is blah-blah.