The Oakland Athletics made history on Tuesday when they hired the first female coach in Major League Baseball, Justine Siegal.

According to Bleacher Report, Siegal will be serving as a guest instructor for the Athletics Instructional League Club, making her the first woman to coach in MLB history. 

In an interview with Susan Slusser of the San Francisco Chronicle, Siegel was excited and thankful for the opportunity with the A's.

"It's a dream come true. The A's are a first-class organization, and it will be an honor to wear their uniform," Siegel said. 

It has been a long road for Siegal. She recently completed the Major League Scouting Bureau school and has her Ph.D. in sport and exercise psychology. 

With this hiring, MLB becomes the latest professional sports organization to hire a woman. In the NBA, the San Antonio Spurs made history by hiring Becky Hammon as an assistant coach. She led the Spurs to the NBA Summer League championship last July. 

The Sacramento Kings hired Hall of Famer Nancy Lieberman as an assistant coach under coach George Karl. 

During NFL training camp, the Arizona Cardinals hired Jen Welter as a coaching intern for the team during preseason. 

The only professional sports organization that has not hired a woman yet is the National Hockey League. 

Siegal will start working out with players on Oct. 4 at the Lew Wolff Training Complex in Mesa, Ariz. Although this is only a temporary job, A's assistant general manager David Forst said that a full-time coaching position could open up for Siegal in the future. 

"Justine knows that nothing has been promised, but we're not ruling that out," Forst said.

With this latest trend, it won't be a matter of time before a woman becomes the first full-time coach in sports history.