I sent Ben Badler (of BA) an email about Duran and this was his response:
I hadn't heard anything about Duran's injury until I read the report on MiLB.com, which I assume is true. I have a story coming out soon on DSL Prospects to watch, so if I hear anything new on Duran's injury it will be in there, though I know he also had a balky elbow when he signed. I'm not sure whether Duran's season will really be delayed though, since obviously the GCL season doesn't start until the summer.
And then a poster on Doug's website made this post:
DURAN WILL BE HAVING THE KNEE SURGERY ON THE 17TH OF THIS MONTH. ITS A MINOR SUGERY SHOULD BE READY TO PLAY DURING THE EXTENDED SPRING.
It sounds like Duran will probably be ready for the start of the GCL season.