
In mainstream sports reporting, the term "consistent" is entirely meaningless. When
Joe Morgan says, "He's the most consistent hitter on the ballclub", he is telling us absolutely nothing (I think he really means *best*, but that's a discussion for another day). In coverage of college basketball over the next month, we will be bombarded with discussion of how team X has to be more "consistent" to make a deep run. It's all BS.
"Consistency" does have an actual, significant application however, and can be interesting when discussed intelligently. First off, it's important to note that being consistent is
not necessarily a good thing. If you're a 12 seed playing in the first round, the last thing you want is to consistently play to the level of a 12 seed. If you do this, you will lose almost every time. It would be in your best interest to play like a 6 seed half the time, and like one that belongs in the NIT the other half. If you have inferior talent, it is to your advantage to be inconsistent.
The opposite is true when the situation is reversed. Kansas, the team that currently sits atop the
Pomeroy ratings, would greatly benefit by being more consistent. On some nights they absolutely destroy teams (
KU 84, Nebraska 49), but on others they play far below their talent level (
Oklahoma St. 61, KU 60). The Jayhawks would benefit greatly from being more consistent and playing to their true level of talent every night- they'd almost never lose.
With that being said, the following is my attempt to quantify how consistent the 73 BCS teams have been this year. Simply put, all I've done is calculated the standard deviation of a team's performance against the spread.
It is important to note that this is very different from how each team has performed against the spread (or against expectations). That can be measured with the average of their performance against the spread- for example, UCLA has beaten the spread of their games by an average of 2.3 ppg. That is interesting in itself, and I'll have a post about it later this week, but is irrelevant when discussing consistency.
What I'm measuring here is how consistent each team has been in its performance against the spread (ATS). For example, if team X plays six games and beats the spread by 5 points in each, their average ATS is 5, and the standard deviation is 0. If team Y plays five games, covers by 9 three times, and covers by 1 the other three, their average ATS is still 5, but the standard deviation is 4.4. Clearly, team X has been more consistent than team Y, and this shows in the standard deviation.
Using this method, here are the 12 most consistent teams thus far in conference play (a lower number means a higher consistency):

When you think about this year's Indiana team, I doubt "consistent" is the first word that comes to mind. But on the court, they've been exactly that. They've played right to expectations (6-7-1 ATS), and done so reliably- all but one of Indiana's Big Ten games have been within nine points of the spread. With all the drama surrounding this team, it's anybody's guess how this will translate into March, but their talent level (a 4 seed) is pretty clear.
A second solid Big Ten team also makes the list, that being Purdue. They've gotten here in a very different fashion than the Hoosiers, going 11-3 ATS, and outperforming the spread by an average of 5.3 ppg. The Boilermakers have consistently exceeded expectations, beating the spread by between 3 and 8 points in 7 of their 14 conference games.
The third consistent tournament lock is Stanford. They've beaten the spread by an average of 2.1 ppg, and have been within 10 of that number in all but one of their Pac-10 games. This indicates that the
projected #3 seed will have no trouble in the first couple rounds, but the odds are stacked against the Cardinal pulling off two upsets on the second weekend to reach the Final Four.
Now, the most inconsistent teams:

Two teams that are surprisingly high in the Pomeroy ratings- Marquette (10) and Kansas St. (11), appear here. The Wildcats' standing is pretty clear- they are world beaters at home (+15.6 average ATS, even after
last night), but weak on the road (-3.3 average ATS). Even so, it's hard to know which team will show up in the tournament. When I think of a team that's extremely inconsistent- capable of beating just about anybody, or losing to Texas Tech, Kansas St. is the first team that comes to mind.
Marquette is another interesting case. After starting off Big East play 3-7 ATS, they have covered in their last six games. They lost their first three conference road games by an average of 17 points, but are 4-1 away from the Bradley Center since. Either they are very inconsistent, or they have improved as the season has progressed. Regardless, this is a team capable of making a run in March, and is likely underseeded as a 5.
The consistency numbers for the 49 teams that did not make these lists can be found
here.
Photo:
Yankees Chick.