Arm is not weak, he's struggled in the past with taking proper routes and setting himself up with momentum to make strong throws. He has gotten better at it.
Given how well Tucker has performed defensively in RF it's odd that they haven't at least tried a Brantley/Tucker/Diaz OF to see how feasible it is.
If your starting rotation had prime Keuchel, Greg Maddux and Orel Hersheiser you could get away with the worst OF in history for 3 out of 5 games. The other 2 starters would probably mutiny.
It's hard to believe he is even less productive than Reddick, because Reddick had hit rock bottom for the most part. If he could at least match that production his speed would at least justify the decision. It just isn't happening. Straw is likely going to end up a pinch runner for the rest of his life. And sadly, he isn't even an elite base stealer yet.
Dusty needs to be fired now. We are are world series contender with an historic offense. We need to someone who can manage around our crappy bullpen. One poorly manage game in the playoffs can mean winning it all and losing.