- Siebenthall is in his 10th season as head coach of the OU men's basketball program. It is his 19th season overall with the Braves. From 2005 to 2015, Siebenthall was an assistant coach for Braves Hall of Fame Coach Andy Carrier.
- Has an overall coaching record of 153-117.
- Won the 2019-2020 KCAC regular season championship, earning a trip to the last NAIA Men's Basketball Division II Round of 16.
- Coached Three NAIA All-Americans, One KCAC Player of the Year, 31 All-KCAC performers, Five All-KCAC Defensive Team selections, one KCAC Freshman of the Year, and one KCAC Freshman Team selection.
- Siebenthall's teams have been named KCAC Men's Basketball Team of Character Three Times.
- Had 18 Daktronic Scholar Athletes, Three NAIA Scholar Teams, and one CSC Academic All-District selection.
In his role as associate head coach on former head coach Andy Carrier’s staff, Siebenthall developed a reputation as an exceptional recruiter, having served as the Recruiting Coordinator for the men’s team all nine years of his tenure. During that time, he developed relationships with an extensive network of coaches at the high school, junior college and college levels across the country, which has extended the quality and quantity of the recruiting pool from which OU has drawn. He also managed many of the operational aspects of the men’s program and is known as a topflight organizer in addition to his coaching acumen.
The Carrier-Siebenthall era produced two NAIA Division II National Tournaments, one KCAC Championship, and one KCAC Tournament Championship. The duo also led the Braves to a school single season record of 24 wins in 2007-08 and back-to-back ‘Sweet 16’ appearances in the NAIA National Tournament. In addition, Siebenthall has been instrumental in coaching 18 Daktronic Scholar Athletes, including the most in the country for an NAIA school in 2008; four NAIA All-Americans; seven First Team All-KCAC Players; one Second Team All-KCAC Player; one Third Team All-KCAC Player, three All-Freshmen Team Players; three Defensive Team Players; and one KCAC Player of the Year.
Siebenthall began his career at the University of Kansas as a women’s basketball practice player. He simultaneously served as the Head Basketball Coach for the Kansas Kings AAU youth league. In 2000, he transitioned to Lawrence High School as the Assistant Boys’ Basketball Coach and Head JV Coach, where he further developed his coaching style and philosophy before coming to Ottawa in 2006. With a Master of Arts in Education, Siebenthall also teaches in the University’s School of Education as an Assistant Professor and is highly prized by his students and his dean as a teacher.
Siebenthall and his wife Shayla have two daughters, Berkley and Elle.
