Fillies...you can extend them anytime you want for your own purposes, but we do not have to turn anything official in until February. Right now you have Ryan Zimmerman signed at 43, you can plan on extending him for however long you want, but say he goes all Andrew Cashner and slices his pitching hand up while hunting sometime in January. You can decide to only sign him for 1 more season or you can take the chance and sign him long term. basically, it is just giving us a bit more time to see how things develop and make decisions.
same thing if a guy is traded. for example, i have Wade Davis signed at 2. his trade to KC moves him from sure bullpen guy to possible rotation spot, making if much more likely that i will extend him out. if we had to have contracts decided as soon as the auction was over, it would have been a much different situation.