Yankee Stadium 70s vs 80s

Why are the ratings for Yankee Stadium different for the 70s & 80s? What type of team would build at home for each decade?

From year to year the number of HR hit by LH or RH hitters and the BA of hitters in the very same park is different. SOM happened to pick a year where they were about equal for the 80s game and a year where LH hitters did better from the 70s. The park didn't change, just the stats for the hitters for that particular year. The same is true for the 20XX games each year. The ratings don't stay the same even though the park didn't change.

Not sure if this had an effect on the strat #HR's, but the ball park dimensions actually did not remain the same.

Changes in Yankee Stadium Measurements

The stadium underwent numerous renovations, changing the dimensions in the process. In 1923, the left field line was 285 ft. The straightway left field was 395 ft and the left center 460 ft. The straightway center field was 490 ft. Right center was 425 ft and straightway right center was 350 ft. The right field line was 295 ft and the backstop was 82 ft.

The dimensions of the old Yankee Stadium were altered in 1937. The left field became 301 ft; the straightway left field became 415 ft and the left center 457 ft. The straightway center field was reduced to 461 ft.

The right center became 407 ft and the straightway right field was reduced to 344 ft. The right field line was increased slightly to 296 ft. The backstop was unchanged.

1978 and 1985 Renovations

In 1978, the dimensions were changed again. The left field line became 312 ft and the straightway left field line became 387 ft. The left center became 430 ft. and the straightway center field measured 417 ft. The right center measured 385 ft and the straightway right field was 353 ft. The right field line became 310 ft. and the backdrop was changed to 84 ft.

The 1985 renovations changed the dimensions of the old Yankee Stadium again. The left field line was unchanged, but the straightway left field became 379 ft. The left center was 411 ft and the straightway center field was 410 ft.

The right center was 385 ft and the straightway right field was 353 ft. The right field line and the backstop were not changed. The stadium would be renovated again 1988, leading to the present day specifications.

Thanks. What's the best type of line-up for each decade?

For the 70's you need lots of LH bats and LH SP's, preferably LH bats that can hit LH pitching and there are not many of those. I like Hebner and Parrish there for 3B, Morgan is great, Hernandez can be good. The obvious guys like Stargell, Parker and Brett work. I always try and get Simmons for Catcher. A guy like Buford's switch hitting fits in perfectly there and Henderson to a lesser extent. A few platoon lefty killers(Vail), preferrably cheap fit nicely. I usually try to end up with at least three or four of the guys I mentioned to start. All the lefty SP's work. Really helps the guys with #HR's vs RH(Tanana). RH Sp's like Forsch and Christenson whose good years are "L" Bal are effective, but I try to pitch them on the road if I can to start off. Pretty good park to give Marichel and LaCorte a whirl in as it lessens the damage in some of their off years. Of course many more would work but those are some of my favorites.