Okay, this isn't really a defense of Gardenhire because as most of you know, I believe that the Twins need some significant changes on and off the field, but here's my take:
I believe that the reason Gardenhire and the Twins were able to win the Central fairly regularly over the last 10 years was that he took a "long view" at the season. More than most managers, he epitomizes "keeping an even keel". It is frequently evident in his comments (we'll get 'em next time and we battled our tails off and there's another game tomorrow). It is evident in his lineup construction (please remember the frustration many fans have had when he has failed to move "hot hitters" up in the line-up). It is evident in his BP usage (relievers have a slotted "spot" and he doesn't like to vary from that).
And for the most part it has worked in the regular season. Even now, for those of you who are optimistic and refer to the improvements you've seen this season, I think a large part of it is Gardenhire's willingness to stick with his methods even in the face of defeat.
But while it has generally made him a successful regular season manager, I've always believed that it contributed to (note I didn't say it was the reason for), the Twins downfall in the playoffs. Then, there ISN'T always another game (or at least not many). Success takes on a new urgency in the post-season and sometimes you have to be creative about what you are doing as a manager and the team needs to be able to shift gears (of course, some power pitching wouldn't hurt).
Gardenhire's use of Gray last night really wasn't anything new. And it wasn't anything different from his pattern in years past. With a little better quality BP, he may have "gotten away with it" a little more often but there were plenty of frustrating moments then, too.
Gardenhire isn't going to change ,,, the question is whether the Twins need to make one.