Our Team

Meet Our Team

Baylor Scott & White Sports Surgery Center at The Star Staff and Physicians

Jennilee Caffey

Administrator

Khalid Yousuf, MD

Joint Program Director

Shanon Cooke, MD

Medical Director

Orthopedic Surgery

Orthopedic Hand Surgery

Shahram ‘Shawn’ Yari, MD

Orthopedic Hand Surgery

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Dr. Yari is a fellowship-trained orthopedic surgeon whose treatment focuses on disorders of the hand, wrist and elbow.Full Biography »

Spine Surgery

William Hotchkiss

Spine Surgery

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Specializes in: Back, Neck, Spine, Sports MedicineFull Biography »

Total Joint

Pain Management

Podiatry

Foot & Ankle

Justin Cardenas, MD

Orthopedic Surgery

Dr. Justin Cardenas is a fellowship-trained orthopaedic hip and knee surgeon specializing in hip and knee replacement procedures at Carrell Clinic.

A Dallas native, Dr. Cardenas attended Highland Park High School where he played football and started as a defensive back his senior year. He was a founding member of Iron Sharpens Iron, a Christian men’s bible study which is still active. Upon graduation, he was honored as the top male graduate with the National Honor Society Blue Blanket Award.

Dr. Cardenas continued his education at Texas A&M University in College Station, where he received his undergraduate in Biomedical Sciences. He served as the Director of The Big Event, which is the largest student led one-day service project in the country with over 20,000 student volunteers. He was a Maroon Coats donor liaison and member of the Aggie Men’s Club. For his leadership and involvement, he was awarded the Gates-Muller Leadership Award as one of the top students in the class of 7,000. He went on to attend medical school at Baylor College of Medicine, where he earned his Doctor of Medicine degree and was elected as the medical school class president. He stayed at Baylor College of Medicine to complete his orthopaedic surgery residency. Dr. Cardenas then returned to Dallas as he committed to a year as the inaugural fellow in hip and knee reconstruction at Carrell Clinic and has joined their clinic after fellowship.

Dr. Cardenas is a member of the American Association of Hip and Knee Surgeons, and American Academy of Orthopaedic Surgeons, and the Texas Orthopaedic Association. His clinical specialty is in reconstructive surgery to alleviate hip and knee pain and restore function. He prioritizes a conservative approach and turns to surgical methods only when necessary and enjoys the opportunity to connect with his patients on an individual level to make a lasting impact on their lives through treatment. He enjoys speaking Spanish with his patients as well.

Married and the father of two, Dr. Cardenas is involved in his church at Grace Lake Highlands and enjoys spending time with his wife and sons, making memories through bike rides, camping, or playing on their makeshift backyard kid construction site.

Andrew Dold, MD

Orthopedic Surgery
Dr. Andrew Dold is a fellowship-trained orthopedic surgeon who specializes in arthroscopic procedures of the hip, knee, and shoulder.

Full Biography
He has been in practice in the Dallas, Texas area since 2016 and is the director of sports medicine at Star Orthopedics and Sports Medicine. Dr. Dold is widely considered an expert in biologic treatments including platelet-rich plasma (PRP) and stem cell therapies for the management of cartilage and other musculoskeletal sports-related injuries.

Dr. Dold completed his medical school at Trinity College, University of Dublin in Ireland. He then completed his orthopedic surgery residency training at the University of Toronto in Canada. After residency, Dr. Dold completed a fellowship in orthopedic sports medicine and arthroscopy at New York University’s Langone Medical Center and the Hospital for Joint Diseases. Dr. Dold’s research interests have included platelet-rich plasma (PRP) and stem cell therapy for arthritis and cartilage injuries, hip arthroscopy, labral reconstruction of the shoulder, meniscal repair of the knee, and anterior cruciate ligament (ACL) reconstruction of the knee. He has published numerous book chapters and scientific papers in peer‐reviewed journals including American Journal of Sports Medicine (AJSM), Clinical Orthopaedics and Related Research (CORR), Knee Surgery, Sports Traumatology, and Arthroscopy (KSSTA), Clinical Journal of Sports Medicine, Journal of Arthroscopy, and The Journal of the American Academy of Orthopaedic Surgeons (JAAOS). His research has been presented at numerous regional, national, and international conferences. He is a principal reviewer for Journal of Arthroscopy, American Journal of Sports Medicine (AJSM), and Orthopaedic Journal of Sports Medicine (OJSM). He continues to serve as a lead author and senior editor for OrthoBullets.com.

Dr. Dold has served as team physician and surgical consultant for both the men’s and women’s Canadian Rugby Teams, the Mississauga Steelheads of the Ontario Hockey League, and the NFL Scouting Combine in Indianapolis. He is currently the head team physician for Reedy High School (Frisco ISD), Dallas Reds Rugby Football Club, and Dallas Griffins Rugby Club of Major League Rugby (MLR). He is the medical director of the Gatorade Sports Science Institute (GSSI) at The Star. He has received a number of prestigious awards and honors, including a Top Doctor Award from the International Association of Orthopedic Surgeons in 2017 and a Rising Star Award from SuperDoctors in 2018. He was named to the Top 40 Under 40 list by USA Top 100 Magazine in 2018.

Mark Muller, MD

Orthopedic Surgery
Mark Muller, MD, joined the Carrell Clinic™ in 2008 as a board-certified orthopedic surgeon with expertise in sports related injuries of the knee, hip, and shoulder.

He serves as a team physician for the Dallas Cowboys. He has previously served as the head team physician for the Dallas Stars.

As the son of an Air Force pilot and physician, Dr. Muller grew up in a number of diverse places from Alaska to Texas. His family finally settled in Austin, Texas where he attended high school and they remain in the Texas hill country today. He graduated Magna Cum Laude from Wake Forest University in North Carolina and returned home to Texas for medical training at the University of Texas Southwestern Medical School in Dallas. He remained in Dallas for a general surgery internship at Parkland Hospital prior to entering active duty in the Air Force as a flight surgeon. Dr. Muller served in the USAF Special Operations Command and was stationed at Hurlburt Field Air Force Base in Florida. During his time with this unit, Dr. Muller commanded the medical operations on multiple clandestine deployments, including trips to the Middle East, South America, and Korea. He supported one of the country’s most elite combat search and rescue squadrons and served as the unit’s leader in the medical response to chemical and biologic weapons.

Dr. Muller returned to Dallas for orthopedic surgery residency at UT Southwestern Medical Center. He received multiple distinctions for his academic and clinical performance during his orthopedic surgical training. After completing his residency, he returned to the Air Force and was stationed at Travis Air Force Base in California. He served two years as a military orthopedic surgeon in California. His assignment included a 5 month deployment to provide medical support for Operation Iraqi Freedom and Operation Enduring Freedom in Qatar and Kuwait.

After resigning his commission from the military, Dr. Muller was selected for the prestigious Sports Medicine and Shoulder Surgery Fellowship at Cornell University’s Hospital for Special Surgery in New York City. During his fellowship, Hospital for Special Surgery was selected by US News and World Report as the premiere orthopedic institution in the country. Dr. Muller trained with world-renowned experts in sports medicine and gained expertise in the latest techniques in knee, hip, shoulder, elbow, and ankle arthroscopy. His responsibilities included orthopedic coverage for the New York Giants during the Super Bowl Championship 2007-2008 season. He provided sideline coverage the entire season, including the NFC Championship Game at Lambeau Field and Super Bowl XLII in Arizona. Dr. Muller’s research included knee ligament biomechanical studies and clinical evaluation of lower extremity tendon injuries. He has published in multiple journals and presented at many local and national meetings, including the annual NFL Team Physician Society Meeting and the annual NHL Team Physician Society Meeting.

Dr. Muller is board-certified in orthopedic surgery and subspecialty certified in sports medicine by the American Board of Orthopedic Surgery. He is an active member of many professional organizations including the American Academy of Orthopedic Surgeons, the American Orthopedic Society for Sports Medicine, and the Texas Medical Association. In addition, he serves as an associate master instructor in hip arthroscopy for the Arthroscopy Association of North America.

Dr Muller enjoys spending his rare free time with his wife and two daughters.

Daniel Worrel, MD

Orthopedic Surgery
A native Texan, Daniel A. Worrel, MD, joined the Carrell Clinic™ in 2005.

Dr. Worrel completed his undergraduate studies at Southern Methodist University on academic scholarship where he played on the varsity soccer team until sidelined by his own orthopedic injuries. He graduated with Honors in the Liberal Arts with a degree in Biomedical Engineering. Dr. Worrel is the head team physician for the Dallas Mavericks Basketball team and the assistant team physician for Southern Methodist University.

Dr. Worrel graduated from the University of Texas Southwestern Medical School in Dallas, where he was also an Iatros award finalist his senior year. Dr. Worrel completed his internship in General Surgery at University of Florida, Gainesville, Florida. Dr. Worrel completed his residency at the University of Florida where he participated in the care of the Florida Gators. He served as Academic and Chief Resident in Orthopedics and Rehabilitation. Dr. Worrel completed a traveling fellowship in elbow surgery with the Mayo Clinic in Rochester, Minnesota with Dr. Bernard Morrey, world-renowned expert in elbow surgery, as well as a traveling fellowship in shoulder and elbow surgery/sports medicine with the Kerlan-Jobe Clinic and the University of Southern California in Los Angeles, California.

Dr. Worrel’s interests include disorders of the elbow, shoulder, and knee. He performs arthroscopic surgery, reconstructive (ligament reconstruction and instability) surgery, as well as arthroplasty (joint replacement). He treats sports injuries and fractures of the upper extremity. In addition to treating the athletes of the Dallas Mavericks and SMU, Dr. Worrel treats athletes at all levels. He has provided coverage for The Byron Nelson Classic since 2006, The Cotton Bowl, as well as professional rodeo, baseball, and hockey.

Dr. Worrel has a special interest in treating disorders of the elbow. He performs minimally invasive repairs of biceps ruptures as well as arthroscopic treatment of degenerative, stiff, or traumatized elbows. He also performs ligament reconstruction of the shoulder, elbow, and knee. Dr. Worrel believes very strongly in the importance of an open and honest patient-physician relationship and feels knowledgeable patients make the best decisions about their own treatment. Dr. Worrel feels it is his responsibility to make sure patients are well informed about their conditions and the multiple choices of treatment.

Dr. Worrel has medical staff privileges at North Central Surgical Center, Baylor University Medical Center, and Presbyterian Hospital of Dallas.

Dr. Worrel is a member of the American Academy of Orthopedic Surgeons, Arthroscopy Association of North America, member of the American Medical Association, as well as member of both the Texas Medical Association and Dallas County Medical Society. Dr. Worrel is married with two daughters and enjoys golf, hunting, and his two Labrador retrievers.

Meet Our Team

Baylor Scott & White Sports Surgery Center at The Star Staff and Physicians

Jennilee Caffey

Khalid Yousuf, MD

Shanon Cooke, MD

Orthopedic Surgery

Sheena R. Black, MD

Orthopedic Surgery​

Justin Cardenas, MD

Orthopedic Surgery​​

Daniel Cooper, MD

Orthopedic Surgery​​

Orthopedic Hand Surgery

Megan Wood, MD

Orthopedic Hand Surgery

Shahram ‘Shawn’ Yari, MD

Orthopedic Hand Surgery

Spine Surgery

William Hotchkiss

Spine Surgery

Total Joint

Sheena R. Black, MD

Orthopedic Surgery

Justin Cardenas, MD

Orthopedic Surgery

Andrew Dold, MD

Orthopedic Surgery

Pain Management

Waqas Ali, DO

Pain Management

Samir Khan, DO

Pain Management

Douglas Maxey

Pain Management

Podiatry

Gary Heredia, DPM

Orthopedic Surgery

Morgan Zellers Kaplan, DPM

Orthopedic Surgery

Robert Taylor, DPM

Orthopedic Surgery

Foot & Ankle

Eitan Ingall

Orthopedic Surgery

Megan M. Wood, MD

Brody A. Flanagin, MD

Andrew Dold, MD

Brody A. Flanagin, MD

Waqas Ali, DO

Samir Khan, DO

Brody A. Flanagin, MD

Gary Heredia, DPM

Sheena R. Black, MD

Justin Cardenas, MD

Daniel Cooper, MD

Andrew Dold, MD

Brody A. Flanagin, MD

Paul Ghattas, DO

Alexander Glogau, MD

Sean Haslam, MD

John Heinrich, MD

Michael Khair, MD

Adam Kouyoumijian, DO

Karim Meijer, MD

William Montgomery, MD

Mark Muller, MD

Richard D. Rhodes, Jr., MD

Daniel Worrel, MD

Khalid Yousuf, MD

Orthopedic Surgery

Orthopedic Surgery

Orthopedic Surgery