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College Baseball and RPI - 2021
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<blockquote data-quote="FredJacket" data-source="post: 772874" data-attributes="member: 2843"><p>Anybody up for some pre-season discussion over college baseball and RPI. Am I correct in this assumption.... RPI is still being used as a key measure to compare teams when the NCAA tournament committee parses teams for selection and seeding come May?</p><p></p><p>A few minutes googling around about RPI... there it not overwhelming 'support' for RPI as a great measure to compare teams. It seems to be the "best" alternative among no perfect ones; and still leaves some wondering if it is good enough. Here is a quick synopsis of what goes into the calculations:</p><p></p><p><em>It is based on a combination of a team's winning percentage, their opponents' winning percentage, and their opponents' opponents' winning percentage, with bonuses and penalties involved for road wins against top teams or home losses to lower-ranked teams. </em></p><p>[URL unfurl="true"]http://www.boydsworld.com/baseball/faq.html[/URL]</p><p></p><p><em>Starting in 2013, college baseball RPI formula values each road victory as 1.3 instead of 1.0. Each home win is valued at 0.7 instead of 1.0. Conversely, each home loss counts 1.3 against a team’s RPI and each road loss counts 0.7 against a team’s RPI. Neutral-site games have a value of 1.0, but the committee is studying how to determine if a game should be considered a neutral-site contest. The adjustment is based on data showing that home teams win about 62 percent of the time in Division I baseball."<a href="https://en.wikipedia.org/wiki/Rating_percentage_index#cite_note-Johnson-5" target="_blank">[5]</a> The change was made because of the discrepancy in the number of home games teams play. Some schools are able to play 35–40 of their 56 allowable games at home, while other teams, due to factors such as weather, may play only 20 home games.</em></p><p>[URL unfurl="true"]https://en.wikipedia.org/wiki/Rating_percentage_index#:~:text=Starting%20in%202013%2C%20college%20baseball,0.7%20against%20a%20team's%20RPI.[/URL]</p><p></p><p>If there are more comprehensive or updated explanations of the calculations, I did not find them.</p><p></p><p>The RPI calculation gets more better as more games are played and the "opponents winning percentages" and "opponents' opponents' winning percentages" have an opportunity to "mature". One of the biggest criticisms of RPI for baseball is the fact that teams tend to have a schedule that keeps them playing teams 'regionally' and overlap across the full D1 geographic map is limited which may inflate some RPI's and depress others. The theory here is west coast teams suffer as a result.</p><p></p><p>The way 2021 is shaping up... these problems (if you buy them as problems) are going to be exacerbated.</p><p>1) Travel will be more confined/restricted to smaller radius from teams' home.</p><p>2) Fewer games will be played.</p><p>3) More conference games (by percentage) than out of conference.</p><p></p><p>My assumption is Ga Tech won't be negatively impacted by this because we play in a strong baseball conference AND 'may' be able to play some relatively strong out of conference competition. Is that reasonable? ...or am I missing something?</p></blockquote><p></p>
[QUOTE="FredJacket, post: 772874, member: 2843"] Anybody up for some pre-season discussion over college baseball and RPI. Am I correct in this assumption.... RPI is still being used as a key measure to compare teams when the NCAA tournament committee parses teams for selection and seeding come May? A few minutes googling around about RPI... there it not overwhelming 'support' for RPI as a great measure to compare teams. It seems to be the "best" alternative among no perfect ones; and still leaves some wondering if it is good enough. Here is a quick synopsis of what goes into the calculations: [I]It is based on a combination of a team's winning percentage, their opponents' winning percentage, and their opponents' opponents' winning percentage, with bonuses and penalties involved for road wins against top teams or home losses to lower-ranked teams. [/I] [URL unfurl="true"]http://www.boydsworld.com/baseball/faq.html[/URL] [I]Starting in 2013, college baseball RPI formula values each road victory as 1.3 instead of 1.0. Each home win is valued at 0.7 instead of 1.0. Conversely, each home loss counts 1.3 against a team’s RPI and each road loss counts 0.7 against a team’s RPI. Neutral-site games have a value of 1.0, but the committee is studying how to determine if a game should be considered a neutral-site contest. The adjustment is based on data showing that home teams win about 62 percent of the time in Division I baseball."[URL='https://en.wikipedia.org/wiki/Rating_percentage_index#cite_note-Johnson-5'][5][/URL] The change was made because of the discrepancy in the number of home games teams play. Some schools are able to play 35–40 of their 56 allowable games at home, while other teams, due to factors such as weather, may play only 20 home games.[/I] [URL unfurl="true"]https://en.wikipedia.org/wiki/Rating_percentage_index#:~:text=Starting%20in%202013%2C%20college%20baseball,0.7%20against%20a%20team's%20RPI.[/URL] If there are more comprehensive or updated explanations of the calculations, I did not find them. The RPI calculation gets more better as more games are played and the "opponents winning percentages" and "opponents' opponents' winning percentages" have an opportunity to "mature". One of the biggest criticisms of RPI for baseball is the fact that teams tend to have a schedule that keeps them playing teams 'regionally' and overlap across the full D1 geographic map is limited which may inflate some RPI's and depress others. The theory here is west coast teams suffer as a result. The way 2021 is shaping up... these problems (if you buy them as problems) are going to be exacerbated. 1) Travel will be more confined/restricted to smaller radius from teams' home. 2) Fewer games will be played. 3) More conference games (by percentage) than out of conference. My assumption is Ga Tech won't be negatively impacted by this because we play in a strong baseball conference AND 'may' be able to play some relatively strong out of conference competition. Is that reasonable? ...or am I missing something? [/QUOTE]
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