As Selection Sunday approaches, college basketball fans eagerly await the unveiling of the NCAA Tournament bracket. But how does the selection committee decide which teams make the cut? The process involves a deep dive into advanced analytics, including metrics such as Wins Above Bubble (WAB), KenPom, Strength of Record (SOR), T-Rank, and the NET rankings. Let’s break down these key metrics and see where Kentucky stands in the race for a favorable NCAA Tournament seed.
Key Metrics Used by the NCAA Tournament Selection Committee
WAB is one of the most crucial metrics in evaluating a team’s resume. It measures how many more (or fewer) wins a team has compared to what a hypothetical ‘bubble team’ would achieve against the same schedule. Here’s how WAB is calculated:
- The NET rankings determine the strength of a team's schedule.
- The expected wins for a bubble team against each opponent are calculated.
- The team's actual wins are compared to the expected wins.
- The total Wins Above Bubble is the sum of the differences.
Currently, Kentucky ranks 9th in WAB with a score of 4.66, which indicates they have performed better than a typical bubble team would against their schedule.
KenPom focuses on predictive analytics rather than resume evaluation. It assesses a team’s efficiency on both offense and defense using advanced tempo-free metrics. The key components include:
- Adjusted Offensive Efficiency (AdjOE): Points scored per 100 possessions, adjusted for opponent quality.
- Adjusted Defensive Efficiency (AdjDE): Points allowed per 100 possessions, adjusted for opponent quality.
- Tempo: The number of possessions per game.
Kentucky currently boasts a strong AdjOE (125.6, 8th nationally) but struggles defensively (AdjDE 100.6, ranked 63rd), which may impact their seeding.
T-Rank, developed by Bart Torvik, places more emphasis on recent results and aims to remove ‘garbage time’ from evaluations. Key factors include:
- The average scoring margin throughout the game.
- More weight given to recent performances.
- Underdog teams receive extra credit for close wins, while favorites are penalized for close losses.
Kentucky currently sits 18th.
Strength of Record evaluates a team’s overall performance based on its wins and schedule difficulty. It answers the question: “How difficult would it be for an average Top-25 team to achieve this record?” Kentucky’s 20-10 record, combined with their difficult SEC schedule, strengthens their case for a solid seed and a rank of 3rd.
With a WAB ranking of 9th, Kentucky has built a strong resume, even if their defensive efficiency lags behind. Their KenPom Adjusted Offensive Efficiency (8th overall) and their T-Rank improvement make them a team with upside heading into March.
However, the final stretch of the season and the SEC Tournament will be crucial to wrap up a 3 seed.