After redshirting his first year at IUP, Villarrial began his college career as a reserve nose guard until moving to offensive right tackle midway through his freshman season. While playing for IUP, Villarrial was a three-year All-American and three-year all-conference player. He played in the 1993 Division IInational championship game, and received the Jim Langer Award for Best Lineman in Division II in 1996. Villarrial had his college jersey No. 75 retired by IUP.
Professional career
Villarrial was drafted in the fifth round by Dave Wannstedt in April 1996. Prior to the draft, Villarrial broke the NFL Combine Bench Press Record. As a member of the Chicago Bears from to 1996 to 2003, Villarrial played six seasons under head coachDick Jauron and was a two-year All-Pro player in addition to being named to the All-Joe Team. He paved the way for a 1,000-yard rusher every season, blocked for Anthony Thomas, who was the NFL Offensive Rookie of the Yearin 2001, and was a member of an offensive line that gave up the fewest sacks in the NFL in 2001, when the Bears advanced to the NFC Divisional Playoff Game. He also received the Golden Bear Award, which was given to the rookie who has perfect attendance in the weight room. Villarrial was one of the most sought out free agents in Buffalo Bills history for head coach Mike Mularkey, and continued his streak of 1,000-yard rushers every season with the Bills. He was a member of an offensive line that gave up the fewest sacks in franchise history. Villarrial, who also played two seasons in Buffalo under coach Jauron, finished his NFL career with 148 starts.
Coaching career
Following his professional career, Villarrial returned to Ebensburg, PA, where he served two seasons as the offensive coordinator for the Central Cambria High School football team. He led the team to two district title games, and personally helped 13 players continue their playing careers at the collegiate level, while developing and implementing a successful strength and conditioning program. In late 2009, Villarrial became head coach of the Saint Francis Red Flash football team. The Red Flash compete in the Northeast Conference of NCAA Division I FCS. He had previously served as the offensive coordinator for one season.
