Joe Diaz is a Phoenix

Phoenix, Arizona

Phoenix is the capital, and largest city, of the U.S. state of Arizona, as well as the sixth most populated city in the United States. Phoenix is home to 1,445,632 people according to the official 2010 U.S. Census Bureau data...

 boxing

Boxing

Boxing, also called pugilism, is a combat sport in which two people fight each other using their fists. Boxing is supervised by a referee over a series of between one to three minute intervals called rounds...

 trainer.
In the late 1990s, he opened Joe Diaz Top Level Boxing gym in Phoenix that he was given ownership to from Tom Gaffney. Tom Gaffney is responsible for giving Joe his start in professional boxing.

The name "Top Level Gym" was an old gym that had been operated by Pavo Ketonen since 1970 and had proven to be a popular training and hang-out center for famous boxers, such as Salvador Sánchez

Salvador Sánchez

Salvador Sánchez Narváez was a Mexican boxer born in the town of Santiago Tianguistenco, Estado de México. Many of his contemporaries as well as boxing writers believe that, had it not been for his premature death, Sanchez could have gone on to become the greatest Featherweight boxer of all time...

 who trained there in 1980 before defeating Danny Lopez

Danny Lopez

Danny Lopez is a former American boxer from Fort Duchesne, Utah. He was world Featherweight champion, and a very popular fighter both in television and Southern California, during the 1970s. His nickname is Little Red.-Background:...

for the world's Featherweight title.