2024 - 2025 Radiation Oncology Residents
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Kaleb Darrow, MD
Chief Resident '25Hometown: Knoxville, TN
Undergraduate: University of Tennessee
Medical school: University of Tennessee Health Science Center
Internship: University of Tennessee Medical Center
Research interests: Healthcare disparities, improving access to cancer care and clinical trials, predictors of treatment failure
Outside interests: Hiking, camping, cooking, college football, professional basketball
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Kyra McComas, MD
Chief Resident '25Hometown: Salt Lake City, UT
Undergraduate: Santa Clara University, CA
Medical School: University of Utah School of Medicine, Salt Lake City, UT
Internship: Providence Sacred Heart Medical Center Transitional Year, Spokane, WA
Research Interests: Global health/oncology, adaptive radiotherapy, advocacy, quality of life
Outside Interests: Hiking, biking, skiing, snowshoeing, writing, reading, history, recipe-developing, cooking, sports, weightlifting, traveling
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Ha Pham, MD, PhD
Chief Resident '25Hometown: Saigon, Vietnam
Undergraduate: College of Saint Benedict/Saint John’s University
Medical School: University of Central Florida
Graduate School: Carnegie Mellon University
Internship: Internal Medicine, University of Illinois at Chicago
Research Interests: Radiosensitizer and biosensor development, DNA damage response, tumor microenvironment
Outside Interests: Singing karaoke, biking, dogs, music
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Hayden Byrd, M.D.
Resident '26Hometown: Austin, Texas
Undergraduate: Sewanee- The University of The South
Medical school: University of Texas at Houston
Internship: University of Tennessee Medical Center at Knoxville
Research interests: Non-small cell lung cancer; SBRT
Outside interests: Community; Lacrosse; Outdoors (backpacking, climbing, caving, mountaineering); Violin; Writing
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Jayden Curry Gracie, M.D.
Resident '26Hometown: Memphis, TN
Undergraduate: Vanderbilt University
Medical School: University of Florida
Internship: Vanderbilt University Medical Center, Internal Medicine Prelim
Research Interests: rare disease, treatment toxicity, particle therapy
Outside Interests: dancing (salsa, bachata), painting, home building and interior design, plugging into my faith community, travel, going to the zoo, shopping, horseback riding, being outdoors, eating good food that other people make, writing and inspiring others to live their best lives
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Michael Kessler, MD
Resident '27Hometown: Nashville, TN
Undergraduate: University of Wisconsin
Medical school: University of Tennessee
Internship: Internal Medicine, University of Tennessee Nashville
Research interests: radiation fibrosis, cancer screening/survivorship, nutrition
Outside interests: camping, fishing, intramural soccer/volleyball, fitness/weightlifting, running, Predators hockey
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Gustavo Sosa, MD
Resident '27Hometown: Sacramento, CA
Undergraduate: University of Southern California
Medical School: University of Wisconsin
Internship: Internal Medicine, University of Nevada, Las Vegas
Research interests: oligometastatic disease; targeted radionuclide therapy
Outside interests: cooking, college football, history, exploring local restaurants, sci-fi movies, travel, spending time with family and friends
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Betsy Crosswhite, MD
Resident '28Hometown: Tupelo, MS
Undergraduate: University of Mississippi
Medical school: University of Mississippi Medical Center
Internship: Vanderbilt University Medical Center
Research interests: clinical trials, improving access to cancer care, treatment toxicity
Outside interests: cooking, trying new restaurants, ballet, faith
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Callie Dacyczyn, MD
Resident '28Hometown: South Deerfield, Massachusetts
Undergraduate: University of Massachusetts Amherst
Medical school: Eastern Virginial Medical School
Internship: Eastern Virginial Medical School
Research interests: Healthcare disparities, palliative therapy, quality of life
Outside interests: Hiking, rock climbing, music, traveling, yoga, weightlifting
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David Gannon, MD
Resident '28Hometown: Minneapolis, Minnesota
Undergraduate: Lafayette College
Medical school: Loyola University Chicago
Internship: General Surgery, Loyola University Medical Center
Research interests: Brachytherapy, SBRT
Outside interests: Travel, Reading, History, Film