|Title||Defensive line coach|
|Born||September 9, 1959|
Las Cruces, New Mexico
|Alma mater||New Mexico State University|
|1978–1981||New Mexico State|
|1982–1983||Los Angeles Rams|
|Coaching career (HC unless noted)|
|1988||Western New Mexico (RB)|
|1990–1993||Morehead State (RB)|
|1994||Shreveport Pirates (ASST)|
|1995–1999||Eastern Michigan (DL)|
|2000-2008||Fresno State (DL)|
|2009||New York Jets (DL)|
|2010||Florida Tuskers (DL)|
|2011||Fresno City College (DL)|
|2012||San Jose SaberCats (DL)|
|2012||Sacramento Mountain Lions (DL)|
|2014–2016||New Mexico State (DT)|
|2017–present||Toronto Argonauts (DL)|
Locklin is the son of Billy Ray Locklin, a defensive end who played for the Aggies before spending ten years playing in the Canadian Football League (CFL) with the Montreal Alouettes from 1961 to 1964 and the Hamilton Tiger-Cats from 1965 to 1970. Locklin is the youngest of three brothers.
Like his older brother Ray, Locklin graduated from New Mexico State University and played for the Aggies. Locklin was the All-WAC tight end. Drafted in the sixth round of 1982 NFL Draft by the Los Angeles Rams, he played with them for the 1982 season and with the Denver Broncos in 1987. In between, he played with Arizona in the United States Football League from 1984 to 1985.
Locklin coached at Western New Mexico (1988), Utah (1989), Morehead State (1990–1993), for the Shreveport Pirates in the Canadian Football League (1994), and then for Eastern Michigan (1995–1999) and then as the defensive line coach at Fresno State, before joining the Jets.
Locklin graduated from Rockdale High School in Rockdale, Texas.