Alexander Douglas Smith (born May 7, 1984) is an American football quarterback for the Kansas City Chiefs of the National Football League (NFL). He played college football at the University of Utah, where he was named the Mountain West Conference Player of the Year in 2004 and led Utah to a Fiesta Bowl victory and a national top-five finish.
Selected by the San Francisco 49ers, Smith was the first overall pick in the 2005 NFL Draft. His early tenure with the team was a difficult period for Smith, and in his first six seasons, he played for a different offensive coordinator each year, and struggled with injuries and consistency and drew unfavorable comparisons with fellow 2005 draft pick Aaron Rodgers.
However, under head coach Jim Harbaugh and offensive coordinator Greg Roman in 2011, Smith enjoyed his strongest statistical season. He helped lead the 49ers to their first winning season, first NFC West division title, and first playoff victory since 2002, along with their first NFC Championship appearance since 1997. His newfound success in San Francisco was short-lived; Smith sustained a concussion in the middle of the 2012 season and was replaced by Colin Kaepernick. Despite posting strong statistical numbers during the year, Smith could not regain his starting position after he was medically cleared to play.
Following the 2012 season, Smith was traded to Kansas City on March 12, 2013. In his first season with the team, he led them to a 9–0 start and their first playoff berth in three years. Smith went on to guide the Chiefs to an eleven-game winning streak in 2015 and their first playoff win since 1994. Wikipedia