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Originally Posted by DaddyBigBucks
Recall from a previous post that Troy Smith had 21.55 attempts per game last year, placing him in the bottom 10 in attempts per game. While his peers in this group averaged a humble rating of 115.23, Troy's rating was a manly 162.7.
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I would argue that with the way that the passer efficiency rating is formulated for college football, attempts are the least significant stat in the equation. Because of the multiplicative nature of the formula, a far greater emphasis is on throwing TDs, especially long TDs, and avoiding INTs.
8.4 * YDs + 330 * TDs - 200 * INTs + 100 * COMPs / ATTs
Using Troy Smith's 2005 season as a baseline:
8.4 * 2285 + 330 * 16 - 200 * 4 + 100 * 149 / 237
or
19194 + 5280 - 800 + 14900 / 237
or
38574 / 237
or
162.75949
Troy averaged 9.64 yards per pass completion. Modifying each number down the row to show the adjusted efficiency rating under four different scenarios:
One fewer COMP (presumes loss of YDs using avg): 161.98312
One fewer TD (all other stats are equal): 161.36708
One more INT (all other stats are equal): 161.91561
One more ATT (all other stats are equal, the ATT was incomplete): 162.07563
The best way to boost a pass efficiency rating is with long pass play TDs. As mentioned, with the formula being heavily multiplicative, a long pass play TD bumps the passers' YDs, TDs, and COMPs, while not detracting with additional ATTs. So, as worked above, a COMP is worth .8, an INT is worth .8, a TD is worth 1.4, an ATT is worth about .7.
So, the big killer is throwing an INT in the red zone (duh!).

If you adjust all stats on the line accordingly, presume a 10 yard completion for a TD was actually picked off in the end zone, then a passers' rating drops by over 3 full points since you must lower the YDs, COMPs, and TDs numbers while factoring in the INT.
What does all this mean? Well, obviously, I'll never dispute that Troy Smith is a great, great QB. He has a fantastic arm and he's earned that pass efficiency rating with his performance on the field. However, having threats like Santonio Holmes, Anthony Gonzalez, and Ted Ginn Jr who can bust plays off for 40, 60 or even 85 yards really inflates that passer stat quick. Troy's numbers will be affected as much by how TGII handles sliding into 'Tone's #1 receiver spot than by anything TS does or can do on a football field or in a film room.