John David Gaub is a minor league baseball relief pitcher currently on the Chicago Cubs

Chicago Cubs

The Chicago Cubs are a professional baseball team located in Chicago, Illinois. They are members of the Central Division of Major League Baseball's National League. They are one of two Major League clubs based in Chicago . The Cubs are also one of the two remaining charter members of the National...

.

Prior to playing professional baseball, Gaub attended South St. Paul High School and then the University of Minnesota

University of Minnesota

The University of Minnesota, Twin Cities is a public research university located in Minneapolis and St. Paul, Minnesota, United States. It is the oldest and largest part of the University of Minnesota system and has the fourth-largest main campus student body in the United States, with 52,557...

. He was originally drafted by the Minnesota Twins

Minnesota Twins

The Minnesota Twins are a professional baseball team based in Minneapolis, Minnesota. They play in the Central Division of Major League Baseball's American League. The team is named after the Twin Cities area of Minneapolis and St. Paul. They played in Metropolitan Stadium from 1961 to 1981 and the...

 out of high school in the 25th round of the 2003 amateur draft, however he opted not to sign. When he was drafted in the 21st round of the 2006 amateur draft by the Cleveland Indians

Cleveland Indians

The Cleveland Indians are a professional baseball team based in Cleveland, Ohio. They are in the Central Division of Major League Baseball's American League. Since , they have played in Progressive Field. The team's spring training facility is in Goodyear, Arizona...

, he did sign.

He began his professional career in 2007 with the GCL Indians, going 0-0 with a 2.25 ERA in four games. He pitched for the Lake County Captains

Lake County Captains

The Lake County Captains are a minor league baseball team in Eastlake, Ohio, a suburb of Cleveland. The team, a Class A affiliate of the Cleveland Indians, plays in the Midwest League....

 in 2008, making 34 relief appearances and going 1-1 with a 3.38 ERA. In 64 innings, he struck out 100 batters while walking 32.

On December 31, 2008, he was traded with minor leaguer Chris Archer and Jeff Stevens

Jeff Stevens

Jeffrey Allen Stevens is a Major League Baseball relief pitcher who is currently a free agent. He was originally selected by the Cincinnati Reds in the sixth round of the 2005 Major League Baseball Draft...

 to the Cubs for Mark DeRosa

Mark DeRosa

Mark Thomas DeRosa is a Major League Baseball player. DeRosa is a utility player who has been primarily a second baseman, but can play other positions, including the outfield; he played six positions for the Chicago Cubs. He bats right-handed.DeRosa was selected by the Atlanta Braves in the 7th...

. He split 2009 between the Tennessee Smokies

Tennessee Smokies

The Tennessee Smokies are a Minor League Baseball team based in the Knoxville, Tennessee metropolitan area. The team, which plays in the Southern League, is the Double-A affiliate of the Chicago Cubs of Major League Baseball as of the 2011 season...

 (26 games) and Iowa Cubs

Iowa Cubs

The Iowa Cubs are a Triple-A minor league baseball team, affiliated with the Chicago Cubs, that plays in the Pacific Coast League. Their home games are played in Des Moines, Iowa, at Principal Park.-Franchise history:...

(26 games), going a combined 4-2 with a 2.25 ERA. He struck out 80 batters and walked 33 in 60 innings of work.

Gaub began 2010 with the Iowa Cubs.