Baltimore Orioles Outfielder Trey Mancini published a letter in the Players Tribune titled Tuesday.
Mancini was diagnosed with Stage 3 colon cancer in early March.
Orioles doctors discovered Mancini’s condition after a physical determined he had low levels of iron.
Six days after his diagnosis, Mancini’s tumor was removed.
Mancini started chemotherapy in mid-April and the treatment is expected to last 6 months.
In Mancini’s article, “I’m So Lucky,” he says that “if baseball returns in 2020, it will probably be without me.”