Team & Affiliates


 Ronette Karstens

Performance Coach
Elevation Nation Performance Instructor
Personal Assistant to Coach Rozy * Teach/Coach at Gayville-Volin School

Ronette has been with the Coach Rozy Team since 2015. She graduated from the University of South Dakota with her Bachelors Degree in Education.  She is currently a First Grade Teacher at the Gayville-Volin School District where she also coaches Girls Basketball.

Ronette truly “did it all” while at Gayville-Volin High School; participating in Oral Interpretation, Flags, Cheerleading, Band, Choir, the School Newspaper, Yearbook, Softball and Student Council.  She was named Salutatorian her senior year.  As an athlete she was aware the Radier Award and Academic All-State.

Ronette was a star basketball and track athlete starting on the varsity team as an eighth grader.  She was awarded most improved that year by her coach.  She earned team MVP every year after that as a freshman, sophomore, junior and senior.  her senior season she averages 13.4 points, 10 rebounds, five steals and 5 assists per game.  She was named 2ned Team All TVC for two years and 1st Team All-TVC for one year.   Her track career was as equally impressive as her basketball career.  She ran high school track from 7th grade to 12th grade.  She was named most improved in her 8th grade year and MCP her freshman, sophomore, junior and senior year.  She still holds schools records in the high jump and triple jump.  With her past experience, knowledge and drive, she loves to work hard, focus and bring high energy to at all she does – helps her excel with the Coach Rozy Team.

Ronette has a husband, Justin who also coaches and is a part time assistant with the Coach Rozy Team. She has 3 boys, Caid, Spencer and Preston, whom she loves to spend time with and is involved with their athletic and school programs.

Kyle McKelvey, CSCS

Assistant Director  –  Performance Coach
Elevation Nation Performance Instructor

Kyle has been with Coach Rozy Performance since 2016.    He holds his M.A. in Kinesiology and Sport Science from the University os South Dakota (USD) and is a Certified Strength and Conditioning Specialist (CSCS),  also XPS Certified (Certified EXOS Performance Specialist).  He did his internship at EXOS in Texas where he worked with  30+ NFL Off-Season athletes and 8 NBA Off-Season athletes.

Coach McKelvey was Graduate Teaching Assistant of Kinesiology Department at USD while working on his Masters degree.  He also was on the USD Track and Field Athlete where he was Team Captain, Pan American Shot Put Silver Medalist (Team USA), USATF Junior National Champion, 4-time NCAA National Championship Regional Qualifier, and a State, School, and Summit League Conference Record Holder.  He also served as Volunteer Assistant for USD Spring Football Strength and Conditioning in 2015.

Justin Karstens

Performance Coach 

Teach’s at Gayville-Volin School * Head Boys Basketball Coach (GVHS) *  Assist FB Coach/Def. Coordinator (GVHS)

Coach Karstens, married to Coach Rozy Performance Coach Ronette Karstens, has been with the performance program since 2017.  Teaching and Coaching boys and girls his whole career, Justin brings a wealth of knowledge and sports skill to the Coach Rozy Program.

Justing has been at Gayville-Volin for the past 13 years, where he as been Heads Boys Basketball Coach for the past 7 years (he was previously Girls Head Coach at GV before that) and has been an Assistant Football Coach for the last 7 years.

As mentioned, Justin’s wife Ronette also coaches and is an assistant with the Coach Rozy Team. They have 3 boys, Caid, who is starting his baseball career at Mt. Marty College, Spencer and Preston, who are heavily involved with their athletic and school programs.

David Hofmaier

Performance Coach / Personal Trainer                                                    AVERA Wellness Center Yankton

David Hofmaier joined the Coach Rozy Performance Team in the Summer of 2019.   David has experience with both professional and collegiate athletes working with the San Diego Chargers, University of Nebraska and Idaho State coaching several National Championship teams. He also has experience working in rehab as the Director of Reconditioning at Cal Berkeley. He splits his time currently working with strength and conditioning staff with our team at Coach Rozy in addition to AVERA’S Wellness Center.

Trevor Woods, MA, ATC

Summer Performance Coach
Licensed Athletic Trainer with NATA & SD State Board of Medical Examiners Instructor
Athletic Trainer for Yankton HS & Gayville-Volin HS

Trevor, MA, ATC has a bachelors degree in Athletic Training from South Dakota State University (SDSU) and a Masters Degree in Exercise Science from University of South Dakota (USD). He has been providing Athletic Training coverage to Yankton High School and Gayville-Volin High School for 17 years. He has been doing sports enhancement programs since 2002 working with numerous individual and team State Championship athletes.

He loves working with athletes to improve performance while helping reduce the risk of injuries for the athletes.

Tate Bruckner, CSCS

Performance Coach
Head Softball Coach – Mt. Marty College

Tate has been with Coach Rozy Performance since 2015 helping with the Summer Performance Programs and working with select teams during the year.  Coach Bruckner had worked with the Mount Marty College softball program the last two years as Head Coach.  Prior to that, Tate was strength and conditioning coach for the program as well as Mt. Marty Baseball. Bruckner, a 2014 MMC graduate and a 2009 Menno High School graduate.  Bruckner, who had been a baseball assistant coach the past two seasons, stepped in to run the softball program.

Cade Rickford

Performance Coach

Caid has been with Coach Rozy Performance since 2017 as an Assistant Performance Coach.  Prior to that, Cade was a Coach Rozy Performance Athlete all through his High School career where he as a stand out in Football, Basketball and Track & Field.  Caid finished up basic training for United States National Guards this past fall & winter, and jumped right back into taking over coaching duties and working with teams in the area.  He will be attending South Dakota State University (SDSU) in the fall of 2019 to pursue his degree to become a Strength and Conditioning Coach, and help again this summer with Coach Rozy Performance.

Ben Hammer

Performance Coach

Ben is from Dell Rapids, SD and is a student-athlete at the University of South Dakota (USD) where he is also on the Track & Field squad.  He is majoring in kinesiology and sport management major with an emphasis in exercise science.  Ben has been with Coach Rozy Performance since 2018.

In High School, Ben was a South Dakota state champion in the discus … five-time all-Dakota 12 Conference for track and field … held personal bests of 158-10 in the discus and 54-0 in the shot put.  He led the Quarriers to three South Dakota state titles in football … earned all-state and Elite 45 honors for football … helped the Quarriers finish runner-up at the South Dakota state tournament in basketball and was Dell Rapids High School student body president.

Before going to USD, Ben went to Dakota Wesleyan University whee he set DWU’s school record in the discus with a throw of 169-11 … twice earned GPAC athlete of the week honors … set personal bests of 52-0 for the shot put, 140-0 in the hammer throw and 49-0 in the weight throw.

At USD, Ben has been a stand out:

Indoor Track & Field
Placed fifth in the shot put at the Summit League Championships with a throw of 55-3 ¾ … also took ninth in the weight throw with a distance of 55-10 ½ at the Summit meet … moved to fifth in USD program history in the shot put with the throw of 55-11 ¾… sent the weight throw a season best 55-10 ½ twice during the season, at both the Summit Championships and the Dakota Realty Alumni Meet … recorded seven top-10 finishes during the season.

Outdoor Track & Field
Advanced to his first NCAA Championships in the discus … Summit League Champion in the discus with a throw of 196-6 … the throw broke the Summit League Championships meet record and the South Dakota school record … placed sixth in the shot put with a throw of 57-7 ½ at the Summit meet … also took 10th in the hammer throw at the league meet in 169-5 … placed 11th in the discus at the NCAA West Preliminary with a throw of 181-7 to advance to the finals … earned Academic All-Summit League honors … named USTFCCCA All-Academic … made the Summit League honor roll.

Anne Rasmussen

2020 Winter/Spring Intern: Performance Coach

Anne Rasmussen is from Oak Creek, WI and is a student-athlete at the University of South Dakota (USD) where she is a member of the women’s Volleyball team. She is majoring in Kinesiology with an emphasis in exercise science and minors in business, coaching, and psychology. She will graduate in May, 2020. Anne started with Coach Rozy performance in January of 2020. 

As the libero (defensive specialist) at USD, Anne is a two-time 1st team Summit League All Conference selection and was named the Summit League Defensive Player of the Year in 2018. Anne has won more (11) Defensive Player of the Week award than anyone in Summit League history. Anne is currently 2nd all time in digs at USD. She was also 1 of 6 Summit League Volleyball players to be named to the 2018 All Academic Team. In addition, Anne was selected as 1 of 30 NCAA Senior Volleyball players nationwide to the Senior CLASS award for notable achievements in community, classroom, character and competition. 

Before coming to USD, Anne attended Wisconsin Lutheran HS in Milwaukee, WI where she played varsity volleyball all 4 years and is the school’s all-time digs leader with 2,022. She also played basketball all 4 years and ran track for one of those years. Anne also has 5 older sisters.  


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