We have heard recently that (a) Jason Castro is being pursued by multiple MLB clubs for his services next year, and that (b) the Atlanta Braves are one of those teams in the bidding.
Now, Ken Rosenthal gives us a bit more detail:
Sources: Jason Castro has multiple three-year offers. Team that offers fourth year could gain edge. Nick Hundley Plan B for several clubs.
— Ken Rosenthal (@Ken_Rosenthal) November 21, 2016
Which teams are involved? Likely the Twins, Braves, and one or two others.