SafeCo splits home/away from 2000-2021: A Story of Road Woes?

[Sibelius Hindemith]

If only it were that simple.

Team: Home OPS/Away OPS (Difference)

BOSTON: .831/.724 (-.107)
TORONTO: .823/.771(-.052)
COLORADO: .817/.643 (-.174)
CINCINATTI: .816/.704 (-.112)
DODGERS: .794/.727 (-.067)
WHITE SOX: .789/.729 (-.060)
HOUSTON: .787/.780 (-.007)
SAN FRANCISCO: .778/.760 (-.018)
WASHINGTON: .771/.738 (-.033)
ATLANTA: .766/.743 (-.023)
BALTIMORE: .760/.652 (-.108)
TAMPA BAY: .745/.753 (+.008)
ANGELS: .745/.690 (-.055)
CUBS: .739/.700 (-.039)
MINNESOTA: .738/.737 (-.001)
PHILADELPHIA: .737/.716 (-.021)
KANSAS CITY: .731/.674 (-.057)
SAN DIEGO: .729/.716 (-.013)
ARIZONA: .725/.658 (-.067)
NYY: .720/.738 (+.018)
CLEVELAND: .717/.705 (-.012)
NYM: .710/.700 (-.010)
DETROIT: .707/.706 (-.001)
MILWAUKEE: .699/.727 (+.028)
PITTSBURGH: .699/.648 (-.051)
OAKLAND: .699/.744 (+.045)
ST. LOUIS: .688/.752 (+.064)
TEXAS: .673/.652 (-.021)
MIAMI: .673/.668 (-.005)
SEATTLE: .663/.710 (+.047)

The average of the 30 teams is (.904/30=.030) that they hit 30 points better at Home than on the road.

The Mariners, at +47 points in Road games means they hit 77 OPS points lower at Home than the average team.

In other words, their splits would be .740/.710 if their Home park gave them the average Home Field Advantage.

The pitchers suck on the road, because they suck. Playing in Seattle just masks that by being an offensive succubus.

The Mariners still had a home field advantage because the OPS home/away disparity there was greater for their opponents than them. .93 to .47 last year.

Would love to see you plot their "home field advantage" compared to other teams and say that with a straight face.

I'm talking about hitting + pitching, not just hitting.

[bpj]

Opponents had an OPS of .684 at T-Mobile to our .663 OPS, we didn't have a home field advantage.

[Sibelius Hindemith]

Go roll a ball on turf, then short grass, then long grass Donn. It's not even a tough experiment. You will get 3 different results.

It's right here in black and white-

2013: .694/.696
2014: .664/.687
2015: .715/.729
2016: .761/.752
2017: .761/.738
AVG: .719/.720 (-.001)

2018: .693/.749
2019: .721/.757
2020: .655/.693
2021: .663/.710
AVG: .683/.727 (+.044)

but you have never established the length of the safeco grass in the first place. I asked you that before, seem pretty simple to me. Is it longer than other fields?

That information is not available to the public. But, wouldn't that be the best explanation for why triples are non-existent and doubles low?

[bpj]

Go roll a ball on turf, then short grass, then long grass Donn. It's not even a tough experiment. You will get 3 different results.

It's right here in black and white-

2013: .694/.696
2014: .664/.687
2015: .715/.729
2016: .761/.752
2017: .761/.738
AVG: .719/.720 (-.001)

2018: .693/.749
2019: .721/.757
2020: .655/.693
2021: .663/.710
AVG: .683/.727 (+.044)

but you have never established the length of the safeco grass in the first place. I asked you that before, seem pretty simple to me. Is it longer than other fields?

Longer or thicker or both, yes, absolutely. Proof is in the pudding. 4 years of results after the grass replacement with starkly different results to the previous 5 years speak for themselves at this point.

We went from 5 years of ~ equal offense at home/away to now 4 years at an average 44 OPS points lower at Home. That's a huge shift.

[Sibelius Hindemith]

Opponents had an OPS of .684 at T-Mobile to our .663 OPS, we didn't have a home field advantage.

That just reflects the fact the Mariners were a below average team.

[bpj]

Opponents had an OPS of .684 at T-Mobile to our .663 OPS, we didn't have a home field advantage.

That just reflects the fact the Mariners were a below average team.

No.

On the Road, they had the 17th OPS in the league.
In Home games they're dead last, 30th.

[Donn Beach]

Go roll a ball on turf, then short grass, then long grass Donn. It's not even a tough experiment. You will get 3 different results.

It's right here in black and white-

2013: .694/.696
2014: .664/.687
2015: .715/.729
2016: .761/.752
2017: .761/.738
AVG: .719/.720 (-.001)

2018: .693/.749
2019: .721/.757
2020: .655/.693
2021: .663/.710
AVG: .683/.727 (+.044)

but you have never established the length of the safeco grass in the first place. I asked you that before, seem pretty simple to me. Is it longer than other fields?

Longer or thicker or both, yes, absolutely. Proof is in the pudding. 4 years of results after the grass replacement with starkly different results to the previous 5 years speak for themselves at this point.

We went from 5 years of ~ equal offense at home/away to now 4 years at an average 44 OPS points lower at Home. That's a huge shift.

come on, its not proof, its a conclusion...make an effort to establish it, ask somebody, that is what I suggested before. Ask Divish, ask Drayer, ask whoever. Run your theory by somebody that has been on the field

Tim Wilson was just promoted to head grounds keeper, Bob Christofferson was the former groundskeeper, he supervised installing the new field, ask him.

https://twitter.com/bcsodfather

[Sibelius Hindemith]

Opponents had an OPS of .684 at T-Mobile to our .663 OPS, we didn't have a home field advantage.

That just reflects the fact the Mariners were a below average team.

No.

On the Road, they had the 17th OPS in the league.
In Home games they're dead last, 30th.

I'm not sure what you're getting at. It's understood that T-Mobile is a pitcher's park so why would you be surprised that the M's hit better on the road? The M's opponents struggled even more there which suggests there was a home field advantage overall. Obviously it isn't advantageous for hitters there in general but that's a different argument.

[Donn Beach]

Go roll a ball on turf, then short grass, then long grass Donn. It's not even a tough experiment. You will get 3 different results.

It's right here in black and white-

2013: .694/.696
2014: .664/.687
2015: .715/.729
2016: .761/.752
2017: .761/.738
AVG: .719/.720 (-.001)

2018: .693/.749
2019: .721/.757
2020: .655/.693
2021: .663/.710
AVG: .683/.727 (+.044)

but you have never established the length of the safeco grass in the first place. I asked you that before, seem pretty simple to me. Is it longer than other fields?

That information is not available to the public. But, wouldn't that be the best explanation for why triples are non-existent and doubles low?

what you mean its not available to the public, the infield grass, is Kentucky Bluegrass. The outfield is a blend of bluegrass and rye grass. I am going to assume that is fairly standard for the industry. Is it kept longer than other parks? All Drayer has to do is look down at it to tell you that

[D-train]

We were 2nd to last in BsR but you can't get H/R splits on this stat so doesn't explain the disparity.

https://www.fangraphs.com/leaders.aspx? ... &sort=18,d