If you read the BTB Awards (answer given in link, so don't spoil it for yourself until after) over at Beyond the Box Score, kudos to you. If not, try and figure out who this passage is about:

________ doesn't know anything about groundball/flyball profiles, he doesn't know anything about platoon splits, he doesn't know anything about when to yank certain pitchers, and he doesn't know anything about how to run a Major League bullpen. The sabermetric principle that field managers have little impact on a team's final record falls short here, because ________ occupies his own little world of stupid, and with more than XX years' dugout experience under his belt, it's hard to see him evolving in the role. ________: major tool. That the XXXXXXXX are somehow still in playoff contention is nothing short of a Christmas miracle.

Alright, I X'd out some things I thought would give it away, or at least narrow it down too much. Have fun.

[editor's note, by TheJay] Hyatt got it in the comments: John McLaren of the Mariners.