Mickey Harte may not be on the line for Tyrone's crucial relegation battle with Kerry in Omagh.
The Tyrone County said in a statement the Tyrone manager underwent a surgical procedure on Monday and is now recovering at home.
Mickey Harte did not attend training this week and it is unclear if he will be leading O'Neill County on Sunday at Healy Park.
The Tyrone press release on Mickey Harte.
"Tyrone Senior Football manager Mickey Harte underwent a surgical procedure on Monday and is now recovering at home. He will resume his managerial duties with the senior football team in the very near future.
Coiste Contae Thir Eoghain, the players and backroom team wish Mickey a speedy recovery."