Jacob Howard Hannemann (born April 29, 1991) is an American former professional baseball outfielder.

Hannemann attended Lone Peak High School in Highland, Utah, graduating in 2010.

He agreed to attend BYU, but postponed his enrollment by two years so that he could complete a two-year mission for the Church of Jesus Christ of Latter-day Saints in Little Rock, Arkansas.

[2] Hanneman enrolled in BYU in 2012, but injured his hip flexor, knees, and wrist, and had to take a redshirt for the 2012 season.

[1][4] The Chicago Cubs selected Hannemann in the third round of the 2013 MLB draft, and offered him a $1 million signing bonus.

[1][5] Hannemann signed with the Cubs,[3] 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 ended his season.

[10] He began the 2017 season with Tennessee, and was promoted to the Iowa Cubs of the Class AAA Pacific Coast League.