David Thomas Bush, known in the baseball world as Dave Bush, embarked on his Major League Baseball (MLB) career as a right-handed pitcher. Born on November 9, 1979, in Pittsburgh, Pennsylvania, Bush attended Wake Forest University, where he honed his skills on the mound. His collegiate performance caught the attention of MLB scouts, leading to his selection by the Toronto Blue Jays in the second round of the 2002 MLB Draft.

Bush made his MLB debut with the Blue Jays on July 2, 2004. During his rookie season, he demonstrated potential by posting a 3.69 ERA over 16 starts. His ability to control the game and maintain composure on the mound earned him a spot in the Blue Jays' starting rotation. Over the next two seasons, Bush continued to develop his craft, though he faced challenges with consistency.

In December 2005, Bush's career took a new direction when he was traded to the Milwaukee Brewers as part of a multi-player deal. This move proved to be a turning point, as he became a regular fixture in the Brewers' rotation. In 2006, Bush achieved a career-high 12 wins and maintained a 4.41 ERA over 32 starts. His performance included a memorable complete game shutout against the Houston Astros on June 19, 2006.

Bush's tenure with the Brewers was marked by several highlights, including a near no-hitter against the Philadelphia Phillies on April 23, 2009. He carried a no-hit bid into the eighth inning before it was broken up. Despite some ups and downs, Bush remained a reliable option for the Brewers, contributing to their pitching staff through the 2010 season.

Following his time with Milwaukee, Bush signed with the Texas Rangers in 2011. His stint with the Rangers was brief, as he struggled to find his rhythm and was designated for assignment in July of that year. He finished the 2011 season with the Chicago Cubs' Triple-A affiliate, the Iowa Cubs, after signing a minor league contract.

Bush spent the 2012 season in the Philadelphia Phillies organization, pitching for their Triple-A team, the Lehigh Valley IronPigs. In 2013, he ventured overseas to play for the SK Wyverns in the Korea Baseball Organization (KBO). This international experience added a new chapter to his career, allowing him to continue competing at a professional level.

Throughout his MLB career, Bush was known for his control and ability to pitch deep into games. He relied on a mix of pitches, including a fastball, curveball, and changeup, to keep hitters off balance. While he may not have been a headline-grabbing ace, his steady presence on the mound provided value to the teams he played for.