Now, most of us who browse through these sites are certainly well aware with park factors and use them extensively in any baseball analysis, but I have some aspect of how it is done have bothered me for awhile now.

Namely, that most of the time we just have a flat number to multiply our raw OPS by. and we might look into how it inflates HR/Hits / doubles ... but..

1. it doesn't really take handedness into account

2. it doesn't take style into account.

Let's use the example of Yankee stadium , everyone knows that it has a short right field while the rest of the dimension tend to be normal (and use to be huge). thus, through the history of the Yankees they also loved them left handed sluggers. since they can just hit a modestly well lifted fly ball and it go out.  by this logic the park factors should be much higher for lefties. Joe DiMMagio hitting .900 in the ole stadium is not the same as a lefty hitting .900 in the ole stadium.

But then it doesn't take style into account, for example. Derek Jeter's a right hander. but he's one of the most extreme opposite field hitting player in the game. . thus Jeter gets his share of Yankee stadium specials (12 of 17 HR hit so far this year at home, and looking at hittracker, he has yet to hit a no doubeter this year.)

A few more cases I ponder

A. no power guys in a hitter's park : for example, Juan Pierre put up a .308/.356/.382 line in his two full season at Coors then a .306/.354/.378 line in his 3 full seasons with the Marlins, basically indentical lines dispite changing from the one extreme to another. obviously it doesn't take a rocket scientist to see that because Pierre has zippo power anyway. being in Coors does nothing to his game. (of course it also means he can't take advantage of it.) so OPS+ probably sell him short in that aspect.

B. guys who's ability goes against the park.  Let's look at Jason Bay, a dead pull right hander . Fenway's suppose to help your doubles / average but limit your HRs.  Bay's at 25 doubles so far but that is hardly out of his career context in a healthy good year. where as he has 30 HR, just 5 shy of his career high with a month to go. whie his average is significantly lower than career  . so what to make of this ? it doens't seem like Fenway's park effect is working properly with Bay.

This is obviously more of a random pondering than a fully thought out post. but would be something that we could look into . for example. maybe we can use .OPS of lefties + OPS of lefty against at home / home games   divide by OPS of lefties  + OPS of lefty against on the road  / road games  ? and then we could go further and classify players and see how parks effects them (like dead pull / all fields / opposite field / slap hitters