The National League Division Series begin on Friday and the first one we'll see is the defending champion Cubs visiting the NL East champion Washington Nationals. Here's the info on how to watch Game 1 on Friday.

With the series beginning Friday, each team had to submit its official 25-man roster for the series Friday morning. The only way a change can be made is via injury, and in that case, the player removed isn't allowed to come back. 

Cubs

The most glaring snub appears to be former closer Hector Rondon, who has struggled with health, consistency and effectiveness all season. Of course, Wilson has been bad since joining the Cubs, but evidently the Cubs would rather have Wilson in this one. 

Martin might be a surprise for some, but he's of great help in late innings as a pinch runner and defensive replacement. 

Nationals

Notable omissions would be fifth stater Edwin Jackson and reliever Joe Blanton. Maybe Stephen Drew, too, but overall there are no real surprises here. Anyone paying attention to the Nationals should have been able to nail this one.