Colby Rasmus, an American professional baseball outfielder, began his Major League Baseball (MLB) career with the St. Louis Cardinals. Drafted in the first round of the 2005 MLB Draft, Rasmus quickly rose through the minor league ranks, showcasing his potential as a power-hitting outfielder. He made his MLB debut with the Cardinals in 2009, bringing with him a blend of speed, defensive prowess, and a left-handed bat that promised to be a valuable asset to the team.

During his time with the Cardinals, Rasmus displayed flashes of brilliance, particularly in the 2010 season when he hit .276 with 23 home runs and 66 RBIs. His performance that year highlighted his ability to contribute both offensively and defensively, as he also provided solid defense in center field. However, his tenure with the Cardinals was not without challenges. Rasmus occasionally struggled with consistency at the plate and faced some difficulties in his relationship with the team's management, which eventually led to his trade to the Toronto Blue Jays in July 2011.

Joining the Blue Jays marked a new chapter in Rasmus's career. In Toronto, he continued to demonstrate his power-hitting capabilities. The 2013 season was particularly noteworthy, as he hit .276 with 22 home runs and 66 RBIs, numbers that mirrored his standout season with the Cardinals. His defensive skills also remained a strong point, as he patrolled center field with agility and a strong throwing arm.

Despite his on-field talents, Rasmus's time with the Blue Jays was marked by ups and downs. Injuries and streaky performance at the plate sometimes hindered his ability to maintain a consistent presence in the lineup. After the 2014 season, Rasmus entered free agency and signed a one-year contract with the Houston Astros.

With the Astros, Rasmus found a new environment to showcase his skills. In 2015, he played a key role in helping the team reach the postseason for the first time in a decade. His performance in the playoffs was particularly memorable, as he hit four home runs in six games, setting a franchise record for most home runs in a single postseason series. This power surge helped the Astros advance past the New York Yankees in the American League Wild Card Game and compete fiercely against the Kansas City Royals in the American League Division Series.

Rasmus returned to the Astros for the 2016 season, accepting a qualifying offer from the team. However, his performance that year was hampered by injuries, and he struggled to replicate his previous success at the plate. Following the 2016 season, Rasmus signed with the Tampa Bay Rays, seeking a fresh start and an opportunity to revitalize his career.

In Tampa Bay, Rasmus continued to face challenges with injuries, which limited his playing time. Despite these setbacks, he managed to contribute when healthy, providing power and experience to the Rays' lineup. In 2017, he took a leave of absence from the team and eventually stepped away from baseball for personal reasons.

Rasmus made a brief return to the MLB in 2018 with the Baltimore Orioles, but his time with the team was short-lived. After playing in a handful of games, he decided to retire from professional baseball, citing a desire to focus on his family and personal life.

Throughout his career, Colby Rasmus was known for his power at the plate and his defensive skills in the outfield.