No manager could've had a chance imo with the injuries to the jays in 2013 and the rays in 2014. But does a manager make more of a difference than another?
One could take the argument many ways which have been beaten over by many, but I will say this - imo, keeping things constant and all that you changed in 2014 was Maddon, Showalter, Matheny, etc. over Gibby - and this isn't a knock on Gibby but to what I consider the excellence of the others - I'd definitely rather have one of those guys instead of Gibby. Not to say the team would have won more in 2014 for sure b/c who knows (but generally, M/S/M would imo get more wins than Gibby keeping everything else constant), but imo, managers do make a difference on many things inside and outside the actual game including the culture and how the team plays ball. To take it one step further, I'm not sure what Gibby's philosophy is (other than let them be free and play) with this group and perhaps that's a function of the players put on the field by AA. But you take M/S/M and insert them as manager before the beginning of the 2013 season, the culture of this team would imo be drastically different - and for the better in my opinion.