According to the Athletic, Edzo will get to keep doing Triple Crown events. My uneducated guess is that’s why he will sign with Turner and not ESPN.
That and Turner is probably less work overall. If you look at the NBA and NFL one of the reasons why the the other bat works have been able to attract bigger names as analyst is they basically only have to do the game broadcast and that is it. ESPN you have to do all the Sportscenter hits and other ancillary shows. Though this is more for studio analyst and “down ballot” commentators.
I agree with how quickly some of these hires are leaking out. But you have two networks competing for talent, I guess that moves things along faster.