Ester James Junior III (born December 8, 1959) is an American former football player and coach.
He played as a linebacker in the National Football League (NFL) for 13 seasons, from 1981 to 1993, with the St. Louis / Phoenix Cardinals, the Miami Dolphins, the Tampa Bay Buccaneers, and the Seattle Seahawks.
Since leaving the NFL, Junior has been the executive director of youth programs in Miami under the NBA's Alonzo Mourning.
He was the Seattle Seahawks linebacker coach in 1994 and then was the director of player development programs for the Miami Dolphins from 1996 to 1998.
He was promoted to defensive coordinator in February 2009, but left a month later to become head coach at Central State University in Wilberforce, Ohio.
On March 11, 2020, the College Football Hall of Fame announced the Junior as a member of the 2020 class of inductees.