Jason Bere, a right-handed pitcher, began his Major League Baseball career with the Chicago White Sox. Drafted by the team in 1990, Bere quickly ascended through the minor league ranks, making his MLB debut on May 27, 1993. His rookie season was impressive, as he posted a 12-5 record with a 3.47 ERA, helping the White Sox secure a division title. Bere's performance earned him a spot on the American League All-Star team in 1994, a year in which he continued to excel with a 12-2 record and a 3.81 ERA before the season was cut short by a players' strike.

The mid-1990s presented challenges for Bere, as injuries began to take a toll on his performance. In 1995, he struggled with control issues and posted a 3-10 record with a 7.19 ERA. The following year, Bere underwent Tommy John surgery, which sidelined him for the entire 1997 season. Despite these setbacks, he persevered and returned to the mound in 1998, though his time with the White Sox was nearing its end.

In 1999, Bere signed with the Cincinnati Reds, where he sought to revitalize his career. He showed flashes of his early potential, finishing the season with an 8-9 record and a 4.21 ERA. His tenure with the Reds was brief, as he was traded to the Milwaukee Brewers in 2000. Bere's stint with the Brewers was marked by inconsistency, and he finished the season with a 1-10 record and a 6.63 ERA.

The Chicago Cubs offered Bere another opportunity in 2001, and he responded with a solid season, posting an 11-11 record and a 4.31 ERA. His performance helped the Cubs remain competitive in the National League Central division. Bere's time with the Cubs, however, was marred by injuries, and he was limited to just 12 starts in 2002.

In 2003, Bere signed with the Cleveland Indians, but his season was cut short due to recurring elbow issues. After making just two starts, he was placed on the disabled list and eventually retired from professional baseball.

Throughout his career, Bere faced numerous challenges, including injuries and periods of inconsistency.