Question: Which American football coach was attached to the College of San Mateo, the San Francisco 49ers and the Stanford Cardinals during his career?
Context: Arrington Jones III (born February 16, 1959) is a former American football running back who played one season with the San Francisco 49ers of the National Football League (NFL).  He was drafted by the San Francisco 49ers in the fifth round of the 1981 NFL Draft.  He played college football at Winston-Salem State University and attended John Marshall High School in Richmond, Virginia.  Jones was also a member of the Washington Federals of the United States Football League (USFL).  He was a member of the San Francisco 49ers team that won Super Bowl XVI and has been a coach on several collegiate teams. There have been 19 head coaches in the history of the San Francisco 49ers professional football franchise.  The San Francisco 49ers franchise was formed in 1946 as a charter member of the All-America Football Conference (AAFC) before joining the National Football League (NFL) in 1950 after the AAFC merger with the NFL.  Buck Shaw became the first head coach of the 49ers in 1946, serving for nine seasons—four in the AAFC and five in the NFL.  He coached a number of future College and Pro Football Hall of Famers, such as Frankie Albert, Joe Perry, Leo Nomellini, Y. A. Tittle, Bob St. Clair and Hugh McElhenny.  In terms of tenure, Bill Walsh has coached more games (152) and more complete seasons (10) than any other head coach in 49ers franchise history.  He led the 49ers to playoff appearances in seven seasons, three of which led to the Super Bowl championship, in 1981, 1984 and 1988.  Jerry Rice, Joe Montana, Charles Haley, Ronnie Lott, Johnny Davis, Roger Craig, Fred Dean and Steve Young are among the players Walsh has coached in his career. Ronald Lynn Thomas (born July 9, 1959) is a former American football defensive back who played two seasons with the San Francisco 49ers of the National Football League.  He was drafted by the San Francisco 49ers in the fifth round of the 1981 NFL Draft.  He played college football at the University of Pittsburgh and attended Pascagoula High School in Pascagoula, Mississippi.  Thomas was also a member of the Oakland Invaders of the United States Football League.  He was a member of the San Francisco 49ers team that won Super Bowl XVI. Tom Martinez (February 21, 1946 – February 21, 2012) was an American football coach.  He coached at the College of San Mateo until 2005, when he retired due to health concerns.  He coached at the College of San Mateo after Bill Walsh and John Madden.  The College of San Mateo Football program traditionally has a very high ranking team and draws players from all over the country.  It is interesting to note that NFL Alumni John Madden, of the Oakland Raiders & Bill Walsh, of the SF 49ers, both played & coached at the College of San Mateo early in their careers.  Bill Walsh was claimed to be the best NFL Coach ever and later retired from the 49ers to become the athletic director at Stanford University.  (Ref.  the College of San Mateo Football & Sports Hall of Fame websites for info on Martinez, Walsh, Madden & others).  Prior to the passings of Tom Martinez, he was inducted into the College of San Mateo Sports Hall of Fame.  Many of his former College of San Mateo Football Players remember Tom as taking a Military Drill Sergeant type approach to Coaching at the College level.  Tom had a passion for conducted private coaching sessions with quarterbacks of all ages & from all around the country. Steven Daniel Hendrickson (born August 30, 1966) is a former professional American football linebacker in the National Football League.  Hendrickson attended Napa High School where he was an outstanding varsity player during all four years at the school.  His #30 jersey remains the only one ever retired by the school.  He played college football for the California Golden Bears at California where he graduated with a major in history.  He was named defensive player of the game at the 1988 Blue-Gray Football Classic and was drafted in the sixth round of the 1989 NFL Draft by the San Francisco 49ers.  He played seven NFL seasons for the San Francisco 49ers, Dallas Cowboys, San Diego Chargers, Houston Oilers and Philadelphia Eagles.  Hendrickson was a member of the San Francisco 49ers when they won their fourth Super Bowl XXIV on January 28, 1990.  During his professional career, he played various positions despite his relatively small stature.  Hendrickson is fondly remembered among Chargers fans for being used as a short yardage, goal line running back, despite the fact that his main position was a defensive one.  In particular, Hendrickson scored on a 1-yard run against the Kansas City Chiefs in a January 1993 playoff game in San Diego, to cap off a 17-0 shutout of the Chiefs. William Ernest Walsh (November 30, 1931 – July 30, 2007) was an American football coach.  He served as head coach of the San Francisco 49ers and the Stanford Cardinal football team, during which time he popularized the West Coast offense.  After retiring from the 49ers, Walsh worked as a sports broadcaster for several years and then returned as head coach at Stanford for three seasons. Brian Reid Bollinger (born November 21, 1968) is a former American football offensive guard who played three seasons with the San Francisco 49ers of the National Football League (NFL).  He was drafted by the San Francisco 49ers in the third round of the 1992 NFL Draft.  Bollinger played college football at the University of North Carolina and attended Melbourne High School in Melbourne, Florida.  He was a member of the San Francisco 49ers team that won Super Bowl XXIX. Chris Washington (born March 6, 1962) is a former American football linebacker.  He played professionally in the National Football League (NFL) for the Tampa Bay Buccaneers, San Francisco 49ers and the Phoenix Cardinals.  Chris was a member of the San Francisco 49ers Super Bowl Championship Team in 1989.  He played seven seasons in NFL, 5 years with Tampa Bay Buccaneer, 1 year with Phoenix Cardinals and a year with San Francisco 49ers.  Chris still holds the leading record in tackles of 457 at Iowa State University and is a member of the Omega Psi Phi fraternity.  Chris' career ended as a result of injuries .  He currently resides in San Diego, California. This article is a list of seasons completed by the San Francisco 49ers, an American football franchise representing the San Francisco Bay Area.  The 49ers are members of the West division in the National Football Conference (NFC) of the National Football League (NFL).  The list documents the season-by-season records of the 49ers' franchise from to present, including postseason records, and league awards for individual players or head coaches.  The San Francisco 49ers began play in 1946 as charter members of the All-America Football Conference. The 1972 San Francisco 49ers season was the team's 23rd year with the National Football League.  The 49ers appeared in the playoffs for the third consecutive year.  After an early season injury to Quarterback John Brodie, Steve Spurrier stepped in and turned things around with brilliant performances to get the 49ers back in the playoff picture by going 5-2-1 over eight games.  In the last game of the season Brodie returned in the 4th Quarter and threw two Touchdown passes to lead the 49ers to a 20-17 victory over the Minnesota Vikings, as the 49ers won the third straight Division Title with an 8-5-1 record.  In the Divisional Playoffs at Candlestick the 49ers looked poised for a return to the NFC Championship leading the Dallas Cowboys 28-13 entering the 4th Quarter.  However, the Cowboys would score 17 points to break the hearts of San Francisco again.  This would mark the last playoff appearance for the 49ers until 1981.
Answer: Bill Walsh