Meet the D&D Team

D&D is extremely fortunate to have a talented group of clinicians and support personnel


Kathy I. Dieringer EdD, LAT, ATC

Kathy is a licensed and certified athletic trainer, who has been in the profession for over thirty five years, and is the original owner/founder of D&D Sports Med. She has extensive experience in the treatment and rehabilitation of high school, collegiate, and professional athletes. Kathy is active in her profession, serving in various leadership positions and earning multiple awards throughout her career. 


Clinical Lead

Kathy Heimerdinger PT, COMT


Kathy graduated from Texas Woman’s University with a masters degree in physical therapy in 2000. She has worked in outpatient orthopedics in the DFW area since graduating. Kathy is currently...

Clinic Managers

Chase Duell PT, DPT


Chase graduated from The University of North Texas with a Bachelor’s degree in Kinesiology in 2016. He then attended UT Southwestern for his Doctorate of Physical Therapy, graduating in 2018. He is currently working towards becoming a Certified Strength and Conditioning Specialist as well as earning his IAOM-US dry needling certification. Chase is also an active member of the Sports Section of the American Physical Therapy Association. His special interests...

Rachel Perkins PT, DPT


Rachel attended Centenary College of Louisiana, where she played volleyball and earned her bachelor's degree with a double major in Biology and Psychology in 2016. She then attended UT Southwestern School of Health Professions, where she graduated with her doctorate of physical therapy in 2018. Rachel is certified in Dry Needling, is currently working towards her strength and conditioning certification (CSCS), and hopes to eventually achieve board certification through the APTA as an orthopedic clinical specialist (OCS).  Rachel is passionate about working with athletes and facilitating return to sport, as well as using exercise to help people of all ages return to their hobbies, and prior level of function. Outside of the clinic she enjoys running with her dog Jaxson, playing volleyball, and trying new restaurants with her friends.

Andra Sterzik OTR, CHT

Denton Hand Therapy

Andra is a certified hand therapist who graduated with her Master’s in Occupational Therapy from Texas Woman’s University in 1997. Since that time, her work throughout the DFW area has included both inpatient and outpatient care, as well as neurological rehabilitation. During her time at D & D Sports Med, she has focused her skills on the treatment of hand and upper extremity post- operative.... 


Lesley Hedlund OT, MOT

Denton Hand Therapy

Lesley graduated from Texas Tech University Health Science Center with a BSOT in 1999.  She has experience working in Acute Care, Inpatient & Outpatient Rehab, with 10+ years working with Hand and Upper Extremity patients.  She has completed a Hand and UE Fellowship thru St. Luke’s Hospital in Bethlehem, PA and is certified in Ergonomic Assessment (CEAS I).



Marie Fischer OT, CHT

Denton Hand Therapy


Marie has been an Occupational Therapist since 1980.  Although she has worked treating people from in-patient settings to out-patient settings and from infants to elderly, she has always preferred treating people with hand/arm issues.

In 1991, Marie was one of the first group of therapists nationally to become a Certified Hand Therapist.  Marie is a member of both the...

Kaitlyn McDonald PT, DPT, LAT, ATC


Kaitlyn attended the University of Evansville in southern Indiana and graduated with her Bachelors in Athletic Training in 2017. She subsequently earned her doctorate in Physical Therapy in 2020. Kaitlyn utilizes movement screens such as the SFMA, Y-balance, and FMS to treat many of her patients and enjoys returning athletes of all ages back to sport. When not in the clinic, Kaitlyn enjoys spending time with her husband and her dog, going camping and spending time outdoors.

Rebecca Bentz PT, DPT


Rebecca attended Texas Woman's University in Denton, TX and graduated with a Bachelors of Science in Kinesiology in 2017.  She subsequently attended Texas Woman's University Dallas campus and graduated with her Doctorate in Physical Therapy in 2020.  Rebecca enjoys working with people of all ages and abilities and helping them reach their goals to get back to their lives.  She plans on earning her orthopedic clinical specialist (OCS) certification.  When she's not in the clinic, Rebecca enjoys spending time with her family, volunteering, and exploring DFW with her friends.

Office Staff


Martha Barboza


Ashleigh Zuniga


Front Office

Amari Rouson


Front Office

Eric Hirschi


Front Office