Once again, people on this board are just making up stuff. HERE are the facts, stats and numbers.
Since I don't know the OP is actually tabulating, I'll put it ALL out there. These stats were taken from the NCAA website for stats.
In 2010, I am counting TWO games played for Riley. He only threw four passes against Florida St, so I'm discounting that game. He played against Washington and Air Force. BYU finished 1-1 in those two games.
In 2010, Washington finished #56 in Defensive PER, #27 in Passing D and #70 in Total D.
On the season, against Washington teams were: 216-369 for 2527 yards with 15 TDs 12 INTs 126.40 PER. Riley was 11-17 for 131 yards 2 TD 0 INT 168.26 PER. He was very much above average.
Air Force finished #10 in Defensive PER, #2 in Passing D and #37 in Total D. On the season, against Air Force teams were: 176-321 for 1921 yards with 10 TDs 12 INTs 107.90 PER. Riley was 8-19 for 73 yards 0 TD 0 INT 74.38 PER. He was very much below average.
On the 2010 season, the two teams he played were 392-680 for 4448 yards 25 TD 24 INT 117.67 PER. Riley was 19-36 for 204 yards 2 TD 0 INT 118.71 PER. He was about average.
In 2011, I'm counting six games for Riley. I'm not counting Utah, or UCF where he threw a combined seven passes (six of which came at the end of a very one-sided game). I'm also not counting the Idaho St game which was an FCS team. Nor am I counting Idaho which, even though was a top 100 (#99) Defensive PER team, it was #111 in Passing D and #101 in Total D. The games I am counting are: Utah St, San Jose St, Oregon St, TCU, Hawaii & Tulsa.
BYU was 5-1 in those games. The average Defensive PER, Passing D and Total D rankings of those teams was #74, #73 and #69 respectively. (I'm not sure what to do with Tulsa, as they finished #57 in DefPER, but #117 in Passing D.)
Utah St finished #48 in Defensive PER, #76 in Passing D and #50 in Total D. On the season, against Utah St teams were: 287-474 for 3100 yards with 17 TDs 4 INTs 125.63 PER. Riley was 10-14 for 144 yards 2 TD 0 INT 204.97 PER. He was very much above average.
San Jose St finished #89 in Defensive PER, #54 in Passing D and #93 in Total D. On the season, against San Jose St teams were: 210-340 for 2656 yards with 19 TDs 13 INTs 138.18 PER. Riley was 14-24 for 219 yards 3 TD 2 INT 159.57 PER. He was above average.
Oregon St finished #104 in Defensive PER, #46 in Passing D and #84 in Total D. On the season, against Oregon St teams were: 223-348 for 2573 yards with 28 TDs 11 INTs 146.42 PER. Riley was 17-27 for 217 yards 3 TD 1 INT 159.73 PER. He was above average.
TCU finished #65 in Defensive PER, #60 in Passing D and #32 in Total D. On the season, against TCU teams were: 234-409 for 2907 yards with 23 TDs 10 INTs 130.58 PER. Riley was 15-29 for 215 yards 1 TD 2 INT 111.59. He was below average.
Hawaii finished #82 in Defensive PER, #85 in Passing D and #66 in Total D. On the season, against Hawaii teams were: 247-424 for 3184 yards with 28 TDs 14 INTs 136.52 PER. Riley was 25-37 for 363 yards 3 TD 0 INT 176.74 PER. He was very much above average.
Tulsa finished #57 in Defensive PER, #117 in Passing D and #87 in Total D. On the season, against Tulsa teams were: 307-516 for 3722 yards with 25 TDs 18 INTs 129.10 PER. Riley was 17-40 for 250 yards 3 TD 2 INT 109.75. He was below average.
All together, opposing teams were 1508-2511 for 18,142 yards 140 TD 70 INT 133.57 PER. Riley was 98-171 for 1408 yards 15 TD 7 INT 147.24 PER.
In 2012, I'm counting three games for Riley. I'm discounting Weber St since it's an FBS team. BYU was 2-1 in those games.
Washington St is currently #67 in Defensive PER, #114 in Passing D and #100 in Total D. On the season, against Washington St teams are: 160-258 for 1823 yards with 12 TDs 9 INTs 129.74 PER. Riley was 25-36 for 285 yards 2 TD 0 INT 154.28 PER. He was very much above average.
Utah is currently #93 in Defensive PER, #69 in Passing D and #35 in Total D. On the season, against Utah teams are: 96-156 for 1176 yards with 10 TDs 2 INTs 143.45 PER. Riley was 17-35 for 206 yards 2 TD 1 INT 111.15 PER. He was very much below average.
Boise St is currently #9 in Defensive PER, #6 in Passing D and #127 in Total D. On the season, against Boise St teams are: 77-133 for 8774 yards with 1 TD 8 INTs 97.23 PER. Riley was 4-9 for 19 yards 0TD 3 INT -4.49. He was slightly below average.
So far this season, teams are 333-547 for 3773 yards 23 TDs 19 INTs 125.75 PER. Riley is 46-80 for 510 yards 4 TDs 4 INTs 117.55 PER. Slightly below average.
So all together, I'm tracking 11 games for Riley against Top 100 Defenses (but I don't know if I need to excluding teams that are Top 100 in one category but no tin all three (Defensive PER, Passing D & Total D).
The average ranking of these teams is #61.8 Defensive PER, #59.6 Passing D, #61.9 Total D. Those team's combined Defensiver PER is 129.53. Riley's combined PER in those games is 135.38. BYU's record is 7-4.
Riley has been an average QB. He makes plays and gives BYU chances to win games. He met the standard in six of the 11 games - BYU won all six of those games. He was above average in six of those games.
Please stop making stuff up.