|Phil Hughes||IP||ERA||K/9||BB/9||GB Rate||HR/BIA*|
|Andy Pettitte||IP||ERA||K/9||BB/9||GB Rate||HR/BIA|
*HR/BIA is home runs / balls in air, which includes all batted ball types other than ground balls.
Both pitchers show a significant split between their home and road performances, but Hughes is at greater risk because of his very low groundball rate (6th lowest among major league starters in 2010). According to ESPN's 2010 park factors, Target Field has the lowest home run park factor at 0.64, while Yankee Stadium has the third-highest at 1.42. As an extreme fly-ball pitcher, Hughes is best suited in the park that suppresses home runs. I'm aware that that's not the whole story, as it's hard not to go with Pettitte in the deciding game based on his postseason success, but I still think it's questionable to have Hughes pitch an extra game at Yankee Stadium.
The data are from Fangraphs; the batted ball types are determined by the Baseball Info Solutions stringers.
If you're interested, here is the full list of ESPN's 2010 park factors.