Shelby Miller is a former professional baseball player who played as a pitcher in Major League Baseball (MLB). He was born on October 10, 1990, in Houston, Texas, and attended Brownwood High School in Brownwood, Texas. Miller was drafted by the St. Louis Cardinals in the first round of the 2009 MLB draft and made his MLB debut with the team in 2012.

Miller spent his first three seasons with the Cardinals, where he established himself as a promising young pitcher. In 2013, he finished third in the National League Rookie of the Year voting after posting a 15-9 record with a 3.06 ERA. The following year, he was named an All-Star for the first time in his career and finished the season with a 10-9 record and a 3.74 ERA.

In November 2014, Miller was traded to the Atlanta Braves as part of a deal that sent outfielder Jason Heyward to the Cardinals. Miller spent just one season with the Braves, where he struggled with a 6-17 record and a 3.02 ERA. Despite his struggles, Miller was traded again in December 2015, this time to the Arizona Diamondbacks.

Miller's time with the Diamondbacks was marred by injuries, and he was limited to just 20 starts over two seasons. In 2017, he underwent Tommy John surgery, which caused him to miss the entire season. He returned to the mound in 2018 but struggled with a 0-4 record and a 10.69 ERA in just five starts.

After the 2018 season, Miller became a free agent and signed a one-year deal with the Texas Rangers. He made just eight appearances with the team before being released in July 2019. Miller then signed a minor league deal with the Milwaukee Brewers but did not make an appearance with the team.

In January 2020, Miller signed a minor league deal with the Chicago Cubs but did not make the team's opening day roster. He then signed a minor league deal with the Milwaukee Brewers in July 2020 but did not make an appearance with the team.

In February 2021, Miller signed a minor league deal with the Chicago Cubs but was released in March 2021. He announced his retirement from baseball in May 2021 at the age of 30.

Overall, Miller's baseball career was marked by early success with the Cardinals, followed by struggles with injuries and inconsistency with several other teams. Despite his setbacks, Miller was a talented pitcher who showed flashes of brilliance throughout his career.