Prior to his professional career, he attended Brigham Young University (Brigham Young University) and played college baseball for the Brigham Young University Cougars. Hannemann attended Lone Peak High School in Highland, Utah, graduating in 2010.
The Kansas City Royals selected Hannemann in the 48th round of the 2010 MLB Draft. Though the Royals offered Hannemann a $250,000 signing bonus, Hannemann opted not to sign. While a student at Lone Peak, Hanneman was offered a scholarship to attend Brigham Young University (Brigham Young University) to play college baseball and college football for the Brigham Young University Cougars.
Hanneman enrolled in Brigham Young University in 2012, but injured his hip flexor, knees, and wrist, and had to take a redshirt for the 2012 season.
Playing for the school"s baseball team in the 2013 season, Hannemann had a.344 batting average with five home runs, 29 runs batted in, 14 stolen bases in 15 attempts, a.415 on-base percentage, and a.553 slugging percentage. He was named the West Coast Conference Freshman of the Year and a Freshman All-American by Louisville Slugger.
The Chicago Cubs selected Hannemann in the third round of the 2013 MLB Draft, and offered him $1 million to sign. Hannemann signed with the Cubs, and made his professional debut, but he appeared in only 17 games for the Arizona Cubs of the Rookie-level Arizona League and the Boise Hawks of the Class A-Short Season Northwest League before injuries and fatigue ended his season.
In 2014, he began the season with the Kane County Cougars of the Class A Midwest League and was promoted to the Daytona Cubs of the Class A-Advanced Florida State League.
After the season, the Cubs assigned Hannemann to the Arizona Fall League, where he batted.279 in 17 games. Hannemann began the 2015 season with the Myrtle Beach Pelicans of the Class-A Advanced Carolina League, and was promoted to the Tennessee Smokies of the Class Associate of Arts Southern League in April.
