Baltimore Ravens head coach John Harbaugh celebrates after a victory over the Cincinnati Bengals in the NFL football game, Sunday, Jan. 3, 2021, in Cincinnati. (AP Photo/Bryan Woolston)

Baltimore Ravens head coach John Harbaugh celebrates after the Ravens beat the Tennessee Titans in an NFL wild-card playoff football game Sunday, Jan. 10, 2021, in Nashville, Tenn. (AP Photo/Mark Zaleski)

FILE - Baltimore Ravens head coach John Harbaugh celebrates after beating the Los Angeles Rams in an NFL football game in Los Angeles, in this Nov. 25, 2019, file photo. Home-field advantage in the playoffs is overrated for Ravens coach John Harbaugh, who has found that the road to success in the postseason usually involves packing his bags and getting the heck out of Baltimore. Last week's 20-13 victory in Tennessee was Harbaugh's eighth on the road in the playoffs, the most by any coach in NFL history, breaking a tie with Tom Landry and Tom Coughlin. (AP Photo/Marcio Jose Sanchez, FIle)