X factors: Five keys for Rangers in 2013

Opening Day is closing in for the Texas Rangers. We know Matt Harrison will be taking the mound and that Adrian Beltre will be cleaning up at third base again. We know the Rangers need Yu Darvish to build off his strong finish to last season. But what other key factors will decide the Rangers' fate in 2013?

ESPN Dallas' Richard Durrett listed five key X factors that could decide how well, or how poorly, the Rangers fare. Here's a clip of what he had to say about Derek Holland:

Holland becomes the tipping point. If he jumps up and pitches close to how he did in the second half of 2011, the Rangers' rotation tips in a good direction. Holland was 10-1 with a 2.77 ERA in his final 15 regular season starts that season. And he was magnificent against the Cardinals in Game 4 of the World Series. ... But that didn't carry over to 2012. ... Holland is focused on improving this season and is embracing the fact that he's under pressure to deliver this season.

You can read about the rest of Durrett's X factors for the Rangers here.

Who or what do you think is the key to the Rangers' success in 2013?