The Pre-Disabled List

It looks like one of the few injured Dodgers that will be ready for opening day is shortstop Corey Seager. I do not know when the Dodgers can officially start a Disabled List but it looks like they will be able to already fill that list. How many players can you put on the Disabled List? Yasmani Grandal's shoulder is still bothering him, Howie Kendrick was scratched from his latest start with a calf problem, and then there are the pitchers. Brett Anderson has already been lost for several months, Alex Wood has had various issues, Scott Kazmir has had a mystifying loss in velocity, and Mike Bolsinger was scratched from his last start due to an abdominal muscle issue.