Brock played for the New Orleans Saints from 1980 to 1992. He finished his career with the San Diego Chargers from 1993 to 1995. He played in Super Bowl XXIX for the Chargers. Stan's older brother Pete also played in the NFL for the Patriots, starting at center in Super Bowl XX, which coincidentally was played in New Orleans. Brock was inducted into the New Orleans Saints Hall of Fame in 1997.
Coaching career
After his playing career, Brock became a coach in the Arena Football League, where he served as the head coach of the Portland Forest Dragons and the Los Angeles Avengers. He also was a color analyst for radio broadcasts of Saints games for several seasons, succeeding Archie Manning, who resigned position when son Peyton entered the NFL with the Indianapolis Colts. On January 29, 2007, he was named the head coach at Army after the resignation of Bobby Ross. During his time as head coach, the Black Knights posted a 6–18 record and lost twice to Navy by a combined score of 72–3. On December 8, 2008, Brock was fired by the USMA on December 12, 2008 after two years as head coach, and six days after the Black Knights completed their 2008 season with a 34–0 loss to archrival Navy.
Development and implementation of the “Brock Bone” offense
Following a 3–9 record in his first season as Army’s head coach, Brock and his staff decided to change his offensive system from the pro set to something more similar to Navy's triple option, something Brock had once described as “a stupid idea.” During spring training for the 2008 season, Brock elected to close spring practices to implement his new offense. The offense Brock developed was dubbed “the Brock Bone” by ESPN commentator Shaun King. The Brock Bone seems to employ a higher percentage of fullback dives than are ordinarily seen in a triple option offense. Coach Brock has commented, “People think that we're just calling fullback dive, but when that’s what they give you, that’s what they give you.” Army ran the Brock Bone during the 2008 NCAA Division I FBS football season and finished the season ranked 110th out of 119 NCAA Division I FBS teams in total offense.
Broadcasting career
On January 14, 2015, Portland, Oregon television station KOIN hired Brock as sports anchor.
Family
Brock and his wife, Lori, have four daughters: Sarah, Jessica, Rachel and Emily.