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Greg Papa Hospitalized With Advanced Heart Failure as Comeback Is Paused

UCSF performed diagnostic tests after a bone marrow transplant aggravated his pre-existing genetic cardiomyopathy.

Broadcaster Greg Papa looks on before the game between the San Francisco 49ers and the Seattle Seahawks at Levi's Stadium on Jan. 3, 2026, in Santa Clara, Calif.
Radio announcer Greg Papa on the sidelines before the San Francisco 49ers played the Seattle Seahawks at Levi’s Stadium in Santa Clara on Saturday, Jan. 3, 2026. It is Papa's first game back after undergoing treatment for acute lymphoblastic leukemia B-cell which was diagnosed before the season.

Overview

  • Greg Papa was admitted to UCSF on Sept. 7 after his cardiomyopathy worsened following a bone marrow transplant earlier this year.
  • The Advanced Heart Failure team at UCSF carried out a diagnostic procedure to evaluate his heart and guide next steps in treatment.
  • KNBR had rehired Papa for a part-time midday show and NBC Sports Bay Area appearances after public backlash to an August layoff, but those plans are now on hold.
  • Papa’s transplant cleared his leukemia but led to severe complications this summer, including collapsed lungs, a long ICU stay and ongoing pulmonary rehabilitation.
  • A GoFundMe run by the David Benzer Strike Out Fear Foundation is helping cover uncovered medical costs and his timeline to return to broadcasting remains uncertain.