Staff Directory
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Juan Castillo
- Title:
- Assistant Coach, Offensive Line
Juan Castillo completed his first year as offensive line coach for the UCLA football program in 2024. Castillo owns more than 40 years of coaching experience, including nearly 30 in the NFL. Over the years, Castillo has held roles on the staffs of current NFL head coaches Jim Harbaugh, John Harbaugh, Sean McDermott and Andy Reid after beginning his career on the collegiate level.
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The Bruins, who worked through seven iterations of their offensive line due to injuries in 2024, saw its most success with the configuration of Niki Prongos (LT), Spencer Holstege (LG), Sam Yoon (C), Josh Carlin (RG) and Garrett DiGiorgio (RT) in Weeks 5-9. That grouping averaged 100 yards more of total offense from the first four weeks of the season, jumping from 262.0 yards per game to 367.6. Prongos and Yoon improved mightily throughout the season experiencing the first action of their careers in starting roles. UCLAโs offense found its groove in the last half of the regular season, recording five games with 350 yards or more of total offense in its last six contests. The Bruinsโ ground game eclipsed 100 yards three times in 2024, highlighted by a season-high 211 rushing yards versus Iowaโs rushing defense which ranked 18th in the nation entering Week 9.
Castilloโs longest NFL tenure came in Philadelphia, where the Eagles captured six NFC East titles, made five trips to the NFC Championship Game and advanced to Super Bowl XXXIX during his 18 seasons (1995-2012) on staff. He coached five different Eagles players who earned nine Pro Bowl honors under his direction, including tackles Tra Thomas and Jason Peters and guard Shawn Andrews. Running backs Duce Staley, Brian Westbrook and LeSean McCoy ran for a combined six 1,000-yard seasons. When Castillo shifted over to the defensive side of the ball in 2011, the Eagles tied for the league lead with 50 sacks. His unit allowed the eighth-fewest yards of total defense per game (324.9) and had the 10th-best scoring defense (20.5 points per game).
Castillo arrived in Westwood after most recently spending time on Ron Riveraโs Washington Commanders staff. Castillo joined the Commanders in 2022 as tight ends coach before continuing in that role the next year, when he coached alongside current UCLA associate head coach and offensive coordinator Eric Bieniemy.
As offensive line coach for the Chicago Bears under head coach Matt Nagy, Castillo guided a group that helped David Montgomery rate fifth in the NFL with 1,070 rushing yards in 2020. Chicagoโs ball carriers combined for more than 2,000 yards in 2021, ranking seventh in the league.
In 2019, Castillo returned to the college ranks and served as an offensive analyst at Michigan. The Wolverines ranked 15th nationally that season in yards per play (6.09) while rushing for over 200 yards (203.2) and scoring 35.2 points per game. Future Bruin Zach Charbonnet led Michigan in rushing that season, piling up 726 yards and 11 touchdowns on the ground.
While with the Buffalo Bills as run game coordinator and offensive line coach in 2017 and 2018, Castillo worked with a trio of NFL Pro Bowlers in running back McCoy, center Eric Wood and guard Richie Incognito. Each of the Billsโ ground attacks with Castillo on staff registered a top-10 showing, with the 2018 team putting up 124 rushing yards per game (fifth in the NFL) and the 2017 group putting up 126.1 (sixth).
With the Baltimore Ravens from 2013-16, Castillo served as run game coordinator and offensive line coach. Guard Marshall Yanda (four times), running back Ray Rice and fullback Vonta Leach were named to NFL Pro Bowl rosters during his term. Castillo originally joined the Ravens as a consultant during January of 2013 and the lead-up to their Super Bowl XLVII run. Across his final three years in Baltimore, Castilloโs line surrendered the leagueโs fewest total sacks (76) โ including just 19 in 2014.
Castillo began his coaching career with two stints at his alma mater, Texas A&M-Kingsville, sandwiched around a four-year tenure at H.M. King High School in Kingsville, Texas. From 1982-85, he coached defensive line and linebackers at Texas A&M-Kingsville. Castillo was the defensive coordinator and linebackers coach at King High School from 1986-1989. He returned to Texas A&M-Kingsville from 1990-1994 as offensive line coach before getting his first NFL opportunity. Castillo developed four future NFL starters during his time with the Javelinas: Jermane Mayberry (first-round draft pick of Philadelphia in 1996), Earl Dotson (third-round pick of Green Bay in 1993), Jorge Diaz and Kevin Dogins. Texas A&M-Kingsville won four Lone Star Conference (LSC) championships during his time on staff (1985, 1992-94) and made an appearance in the 1994 NCAA Division II national championship game.
Castillo played linebacker at Texas A&M-Kingsville (then Texas A&I University) and moved on to the United States Football Leagueโs San Antonio Gunslingers before embarking on his coaching career. He attended Port Isabel High School, earning all-state recognition as a linebacker on the gridiron. On July 4, 2009, Port Isabel, Texas celebrated โJuan Castillo Day,โ presenting Castillo a key to the city. In 2015, he was inducted into the LSC Hall of Honor.
Castillo has four children from his first marriage โ Gregory, John, Andres and Antonio. He and his second wife, Kelly, married in 2022. She has two children, Franco and Vivienne.
CASTILLOโS COACHING EXPERIENCE
1982-85 โ Defensive Line/Linebackers, Texas A&M-Kingsville
1986-89 โ Defensive Coordinator, H.M. King HS (Kingsville, Texas)
1990-94 โ Offensive Line, Texas A&M Kingsville
1995, 1996 โ Offensive Assistant, Philadelphia Eagles
1997 โ Tight Ends, Philadelphia Eagles
1998-2010 โ Offensive Line, Philadelphia Eagles
2011, 2012 โ Defensive Coordinator, Philadelphia Eagles
2013 โ Run Game Coordinator, Baltimore Ravens
2014-16 โ Offensive Line, Baltimore Ravens
2017, 2018 โ Run Game Coordinator/Offensive Line, Buffalo Bills
2019 โ Offensive Analyst, Michigan
2020, 2021 โ Offensive Line, Chicago Bears
2022, 2023 โ Tight Ends, Washington Commanders
2024 โ Offensive Line, UCLA
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The Bruins, who worked through seven iterations of their offensive line due to injuries in 2024, saw its most success with the configuration of Niki Prongos (LT), Spencer Holstege (LG), Sam Yoon (C), Josh Carlin (RG) and Garrett DiGiorgio (RT) in Weeks 5-9. That grouping averaged 100 yards more of total offense from the first four weeks of the season, jumping from 262.0 yards per game to 367.6. Prongos and Yoon improved mightily throughout the season experiencing the first action of their careers in starting roles. UCLAโs offense found its groove in the last half of the regular season, recording five games with 350 yards or more of total offense in its last six contests. The Bruinsโ ground game eclipsed 100 yards three times in 2024, highlighted by a season-high 211 rushing yards versus Iowaโs rushing defense which ranked 18th in the nation entering Week 9.
Castilloโs longest NFL tenure came in Philadelphia, where the Eagles captured six NFC East titles, made five trips to the NFC Championship Game and advanced to Super Bowl XXXIX during his 18 seasons (1995-2012) on staff. He coached five different Eagles players who earned nine Pro Bowl honors under his direction, including tackles Tra Thomas and Jason Peters and guard Shawn Andrews. Running backs Duce Staley, Brian Westbrook and LeSean McCoy ran for a combined six 1,000-yard seasons. When Castillo shifted over to the defensive side of the ball in 2011, the Eagles tied for the league lead with 50 sacks. His unit allowed the eighth-fewest yards of total defense per game (324.9) and had the 10th-best scoring defense (20.5 points per game).
Castillo arrived in Westwood after most recently spending time on Ron Riveraโs Washington Commanders staff. Castillo joined the Commanders in 2022 as tight ends coach before continuing in that role the next year, when he coached alongside current UCLA associate head coach and offensive coordinator Eric Bieniemy.
As offensive line coach for the Chicago Bears under head coach Matt Nagy, Castillo guided a group that helped David Montgomery rate fifth in the NFL with 1,070 rushing yards in 2020. Chicagoโs ball carriers combined for more than 2,000 yards in 2021, ranking seventh in the league.
In 2019, Castillo returned to the college ranks and served as an offensive analyst at Michigan. The Wolverines ranked 15th nationally that season in yards per play (6.09) while rushing for over 200 yards (203.2) and scoring 35.2 points per game. Future Bruin Zach Charbonnet led Michigan in rushing that season, piling up 726 yards and 11 touchdowns on the ground.
While with the Buffalo Bills as run game coordinator and offensive line coach in 2017 and 2018, Castillo worked with a trio of NFL Pro Bowlers in running back McCoy, center Eric Wood and guard Richie Incognito. Each of the Billsโ ground attacks with Castillo on staff registered a top-10 showing, with the 2018 team putting up 124 rushing yards per game (fifth in the NFL) and the 2017 group putting up 126.1 (sixth).
With the Baltimore Ravens from 2013-16, Castillo served as run game coordinator and offensive line coach. Guard Marshall Yanda (four times), running back Ray Rice and fullback Vonta Leach were named to NFL Pro Bowl rosters during his term. Castillo originally joined the Ravens as a consultant during January of 2013 and the lead-up to their Super Bowl XLVII run. Across his final three years in Baltimore, Castilloโs line surrendered the leagueโs fewest total sacks (76) โ including just 19 in 2014.
Castillo began his coaching career with two stints at his alma mater, Texas A&M-Kingsville, sandwiched around a four-year tenure at H.M. King High School in Kingsville, Texas. From 1982-85, he coached defensive line and linebackers at Texas A&M-Kingsville. Castillo was the defensive coordinator and linebackers coach at King High School from 1986-1989. He returned to Texas A&M-Kingsville from 1990-1994 as offensive line coach before getting his first NFL opportunity. Castillo developed four future NFL starters during his time with the Javelinas: Jermane Mayberry (first-round draft pick of Philadelphia in 1996), Earl Dotson (third-round pick of Green Bay in 1993), Jorge Diaz and Kevin Dogins. Texas A&M-Kingsville won four Lone Star Conference (LSC) championships during his time on staff (1985, 1992-94) and made an appearance in the 1994 NCAA Division II national championship game.
Castillo played linebacker at Texas A&M-Kingsville (then Texas A&I University) and moved on to the United States Football Leagueโs San Antonio Gunslingers before embarking on his coaching career. He attended Port Isabel High School, earning all-state recognition as a linebacker on the gridiron. On July 4, 2009, Port Isabel, Texas celebrated โJuan Castillo Day,โ presenting Castillo a key to the city. In 2015, he was inducted into the LSC Hall of Honor.
Castillo has four children from his first marriage โ Gregory, John, Andres and Antonio. He and his second wife, Kelly, married in 2022. She has two children, Franco and Vivienne.
CASTILLOโS COACHING EXPERIENCE
1982-85 โ Defensive Line/Linebackers, Texas A&M-Kingsville
1986-89 โ Defensive Coordinator, H.M. King HS (Kingsville, Texas)
1990-94 โ Offensive Line, Texas A&M Kingsville
1995, 1996 โ Offensive Assistant, Philadelphia Eagles
1997 โ Tight Ends, Philadelphia Eagles
1998-2010 โ Offensive Line, Philadelphia Eagles
2011, 2012 โ Defensive Coordinator, Philadelphia Eagles
2013 โ Run Game Coordinator, Baltimore Ravens
2014-16 โ Offensive Line, Baltimore Ravens
2017, 2018 โ Run Game Coordinator/Offensive Line, Buffalo Bills
2019 โ Offensive Analyst, Michigan
2020, 2021 โ Offensive Line, Chicago Bears
2022, 2023 โ Tight Ends, Washington Commanders
2024 โ Offensive Line, UCLA
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