MLB Network severed its relationship with veteran insider Ken Rosenthal in part because of his past criticism toward MLB Commissioner Rob Manfred, according to the New York Post's Andrew Marchand.
"Rosenthal, a top news breaker, was first kept off the air for around three months, according to sources, after he wrote columns in 2020—with the season in jeopardy due to the pandemic—analyzing Manfred's handling of the situation for The Athletic," per Marchand.
Marchand shared a statement from an MLB spokesman:
"As MLB Network continues to look at fresh ways to bring baseball to our viewers, there is a natural turnover in our talent roster that takes place each year.