The difference between optimal strategy and somewhat but sub-optimal (but not absurd) in-game strategy might only be 3 games (making up a number for discussion but it's something like that). The collective talent of a team obviously has a SIGNIFICANTLY larger effect. 3 times larger, easily. As such, it should be clear that correlation between a manager's skill level and his team's record after 140 games is going to be very weak. Now, if a manager with an perennially average payroll at his disposal and has a team that performs well over a 10 year period, that is a very different situation. It is not THIS situation, though. You can claim that Roenicke has been successful but that's because you are attributing a portion of the team's success to Roenicke. I don't because of the correlation issues I mentioned above. I disagree that there is no objective way to attempt to measure a manager's competency. Through analytical means (simulations for instance), one can attempt to estimate the optimal strategy for a particular situation and compare its expected success rate with that of the manager's strategies. If we have a large enough sample to work with (years), we can look at the actual success rate of his moves, relative to the estimated success rate. I don't claim to have "proof" that Roenicke is a bad manager but I'm not just blindly disagreeing with his strategies either. I have not studies his moves particularly close but I am confident that his small ball strategies are better suited for the run environment you would have found at the turn of the 20th century than for the 4.25ish runs/game you see today. Even if you compare Roenicke to his contemporaries, he's leading the universe in sacrifice attempts: http://www.baseball-reference.com/leagues/NL/2011.shtml#teams_standard_batting::25 So everything else equal, either the rest of the NL is wrong for not utilizing sacrifice bunts enough or Roenicke is for employing the strategy too often. I don't know what the answer is for sure but I feel inclined to assume the latter.