Lookout Linkage, 9/17/15

Good morning everyone! Let's see what's happening in the baseball world:

• Troy Tulowitzki is out for a few weeks with a cracked shoulder blade.
• Jeff Sullivan takes a look at the Rangers' latest surge.
• Grant Brisbee wonders if the Rangers and Astros can become true rivals.
• Giants' infielder Joe Panik is likely to be out for the season with a back injury.
• Dave Studeman of The Hardball Times wonders what should be considered when picking an MVP winner.
• Paul DePodesta is considering interviewing for open GM positions.
• Cubs' pitcher Trevor Cahill was thrown out on a line drive to right field trying to run to first base.
• Carlos Peña has retired from baseball.