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Where We Stand (PPDvPwr5 edition)
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<blockquote data-quote="AE 87" data-source="post: 794306" data-attributes="member: 195"><p>As I've posted in previous threads, PPDvPwr5 (points per drive vs power 5) is a calculated raw statistic like points/game or yards/play. The only accounting for schedule strength is in only using data from power 5 (or BCS AQ earlier) opponents. It also only accounts for scrimmage scores, rushing and passing touchdowns and field goals. Safeties as well as defensive or special team scores are not considered. The impact of special teams is assumed to be cooked into the offensive and defensive stats.</p><p></p><p>I created the stat as a way to try and isolate the strength of our offense under Paul Johnson when we could have 3 to 7 fewer drives/game, making points/game a less than reliable metric. </p><p></p><p>A metric of team strength can be calculated by either subtracting the DefPPD from the OffPPD (DiffPPD) or taking the ratio OffPPD/DefPPD (RatPPD). For example, in 2020, Alabama and Clemson were clearly the top 2 teams. However, Alabama's DiffPPD was 2.47 compared to Clemson's 1.62. (Note: A Diff PPD of greater than 1 is typically top 10.)</p><p></p><p>Here's a History of GT's Off and Def PPD vs. Pwr5 or BCS AQ and their rankings for each year:</p><p></p><p>[ATTACH=full]10291[/ATTACH]</p><p>[ATTACH=full]10292[/ATTACH]</p><p></p><p>The first thing that I noticed is that I had forgotten how good our offense was in 2018. How bad our defense was makes it easy to forget that we went to a bowl game (though we didn't really play in one). One of the next things that jumps off the chart to me is that our Defensive numbers for the past two years are right in line with where they've been, though worse than every year but 2018. They are thankfully improving from the 2018 outlier. This is at least suggestive that our problems on defense under CPJ were not as strongly tied to practicing against the option offense as some have argued. </p><p></p><p>Here are our team rankings using both DiffPPD and RatPPD:</p><p></p><p>[ATTACH=full]10293[/ATTACH]</p><p></p><p>That's where we stand within our historical context. Hopefully, things will start clicking this year.</p></blockquote><p></p>
[QUOTE="AE 87, post: 794306, member: 195"] As I've posted in previous threads, PPDvPwr5 (points per drive vs power 5) is a calculated raw statistic like points/game or yards/play. The only accounting for schedule strength is in only using data from power 5 (or BCS AQ earlier) opponents. It also only accounts for scrimmage scores, rushing and passing touchdowns and field goals. Safeties as well as defensive or special team scores are not considered. The impact of special teams is assumed to be cooked into the offensive and defensive stats. I created the stat as a way to try and isolate the strength of our offense under Paul Johnson when we could have 3 to 7 fewer drives/game, making points/game a less than reliable metric. A metric of team strength can be calculated by either subtracting the DefPPD from the OffPPD (DiffPPD) or taking the ratio OffPPD/DefPPD (RatPPD). For example, in 2020, Alabama and Clemson were clearly the top 2 teams. However, Alabama's DiffPPD was 2.47 compared to Clemson's 1.62. (Note: A Diff PPD of greater than 1 is typically top 10.) Here's a History of GT's Off and Def PPD vs. Pwr5 or BCS AQ and their rankings for each year: [ATTACH type="full"]10291[/ATTACH] [ATTACH type="full"]10292[/ATTACH] The first thing that I noticed is that I had forgotten how good our offense was in 2018. How bad our defense was makes it easy to forget that we went to a bowl game (though we didn't really play in one). One of the next things that jumps off the chart to me is that our Defensive numbers for the past two years are right in line with where they've been, though worse than every year but 2018. They are thankfully improving from the 2018 outlier. This is at least suggestive that our problems on defense under CPJ were not as strongly tied to practicing against the option offense as some have argued. Here are our team rankings using both DiffPPD and RatPPD: [ATTACH type="full"]10293[/ATTACH] That's where we stand within our historical context. Hopefully, things will start clicking this year. [/QUOTE]
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