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Unfortunately, a lot of football doesn’t show up on a stat sheet.
For example, most running plays end with a tackle by a LB. Too bad not all tackles are equal. A tackle made 8 yards downfield isn’t
the same as as one made up near the line of scrimmage. If you just look at the number of tackles, you don’t get that information, and unfortunately,
that’s all most people have access to. We call those tackles close to the line of scrimmage “stops.”
Bobby Wagner had 69 of them last season, which is a lot compared to his NFL peers. That particular piece of information is out there if you know
where to look, but few know it’s importance and even fewer bother to use it.
http://www.chatsports.com/seattle-seahawks/a/The-Problem-With-Player-Stats-In-The-NFL-And-A-Project-On-QBs-2-8163193