|Born: January 31, 1987|
|May 20, 2013, for the Minnesota Twins|
|MLB statistics |
(through 2015 season)
|Earned run average||2.74|
Thielbar attended Randolph High School in Randolph, Minnesota, and South Dakota State University, where he played college baseball for the South Dakota State Jackrabbits. The Milwaukee Brewers selected Thielbar in the 18th round of the 2009 MLB Draft. The Brewers released Thielbar in 2011, and then he pitched in independent league baseball for the St. Paul Saints.
Thielbar signed a minor league deal with the Minnesota Twins for the rest of the 2011 season.
The Twins added him to their 40-man roster after the 2012 season. The Twins promoted Thielbar to the majors on May 20, 2013. He made his major league debut that day, pitching two innings. He became the first South Dakota State baseball player to reach the major leagues. He would remain in the Twins bullpen for the remainder of the season, appearing in 49 games with a 1.76 ERA.
Thielbar began the 2014 season in the Twins bullpen, notching 54 appearances. His ERA jumped two runs higher than in his debut season, finishing with a 3.40 ERA. He was designated for assignment on July 31, 2015 after appearing in just 6 games.
San Diego Padres
On August 8, 2015, the San Diego Padres claimed Thielbar off waivers from the Minnesota Twins. The Padres assigned him to their Triple A affiliate, the El Paso Chihuahuas. He was designated for assignment on August 30.
St. Paul Saints
On March 29, 2016, Thielbar signed with the St. Paul Saints of the American Association of Independent Professional Baseball.
Second Stint with St. Paul Saints
On May 27, 2017, Thielbar again signed with the St. Paul Saints for the rest of the 2017 season.
On January 23, 2018, Thielbar signed a minor league deal with the Detroit Tigers he split the season between the AA Erie SeaWolves and the AAA Toledo Mud Hens.  He resigned a minor league deal on October 30, 2018. He was assigned to AAA Toledo Mud Hens for the 2019 season.
- Hartley, Nick (July 12, 2010). "Brookings Register Caleb Thielbar making the most of opportunities". Brookingsregister.com. Archived from the original on March 4, 2016. Retrieved May 21, 2013.
- "News". pgcbl.com. Retrieved May 21, 2013.
- "Caleb Thielbar goes from independent ball to the majors with the Twins | HardballTalk". Hardballtalk.nbcsports.com. Retrieved May 21, 2013.
- "Former SDSU player Caleb Thielbar called up by Twins". Argus Leader. May 20, 2013.[dead link]
- "Twins designate RP Caleb Thielbar for assignment - CBSSports.com". CBSSports.com. July 31, 2015. Retrieved March 29, 2016.
- "» Twinsights: Padres claim Caleb Thielbar off waivers". TwinCities.com. Retrieved March 29, 2016.
- Dennis Lin (August 30, 2015). "Padres' Wil Myers excited to begin rehab assignment, will take it "day-to-day" - SanDiegoUnionTribune.com". The San Diego Union-Tribune. Retrieved March 29, 2016.
- "Former Twins reliever Thielbar returns to St. Paul Saints". Star Tribune. Archived from the original on March 30, 2016. Retrieved March 29, 2016.
- Frisaro, Joe (November 17, 2016). "Marlins sign 5, including 3 lefty relievers". MLB.com. Retrieved November 17, 2016.