TMZ reports that Flair feels he will be okay after undergoing surgery and he's in good spirits. As previously noted, Flair was rushed to the hospital last week. He was also scheduled to undergo a medical procedure on Friday that was heart-related but that was rescheduled for Monday.
A Flair spokesperson told TMZ that he would not be healthy enough to make it to the roast so that is why he had to pull out.
The story also notes that many of Flair's friends, including rapper Offset, have been calling to check on him and Flair has been cracking jokes.
We'll post an update when we hear more about his surgery, which is scheduled for this afternoon.