Adrian Peterson already holds many Vikings' records. He is first in rushing attempts (1754), yards rushing (8,849), rushing TDs (76), 1,000 yard seasons (5), yards per game rushing (99.4), to mention just a few. The awesomeness of these records is: one, that he has accomplished it all in six years; and two, the decisiveness with which he is shattering previous records. Presently, Bill Brown and Chuck Foreman are second in TDs, only 24 behind. Robert Smith is second in rushing yards, though he trails by 2,031 yards despite playing two more seasons. The next closest yards per game rusher? Smith again, at 69.6 yards, about 30 yards short of AP.

After we witnessed Peterson's Herculean efforts last Sunday in the dramatic 37-34 win over the Packers, most Minnesotans are certain that number twenty-eight is this year's NFL MVP. Sure, Peyton Manning has done amazing things in Denver this year. He has kept pace or surpassed Tom Brady and/or Aaron Rodgers. He is alongside Drew Brees. And his team is winning. The Broncos have secured the one-seed in the AFC.

But how long ago was it Tim Tebow winning there? And if Tebow was able to lead Denver to victories last year, how less valuable does that make Manning? Add to that fact that the voters have already given Manning three MVPs, and most could see why they might decide to give the award to AP in 2012.

Adrian fell nine yards short of the all-time yards rushing title last Sunday. As he stated later in the week, it was bittersweet. The perfect story book ending would have had him score in the waning seconds on that final run, not be stopped near the ten yard line. Blair Walsh's field goal that just snuck inside the left goalpost gave Minnesota an improbable ticket to the playoffs while ending one of the greatest seasons ever assembled by any football player.

Just how great?

Peterson finished with 2,097 yards. But his yards per carry was 6.0 in 2012. His yards per game 131.1. Dickerson averaged 5.6 yards per carry in his record setting year in 1984. And he finished 0.5 yards per game higher. Only Jim Brown in 1963 (6.3, 133.1) and O.J. Simpson (6.0, 143.1) in 1973 were better. Ever.

Chris Johnson in 2009 had 2,006 yards, averaging 5.7 a carry, and 125.4 yards per game. He was close.

Another way to measure RB greatness is to total how many times they led the league in rushing. Jim Brown won eight rushing titles in nine seasons, or 89%. Barry Sanders, with four titles in ten years, is at 40%. Earl Campbell won three titles in eight years, or 37.5%. Next is Eric Dickerson at 36.4%. Adrian Peterson is presently at 33.3%, having won his 2nd in his six seasons. Emmitt Smith won four titles, but played 15 seasons, and is at 26.7% despite being the all-time leading rusher.

This would mean that Walter Payton was not very good, as he won only one title in 13 years. Payton was runner-up to Campbell three times. Or Jim Taylor of the Packers would be lesser ranked because he happened to play in the same era as Jim Brown.

No, maybe the truest measure of a running backs' greatness is yards per carry?

Which would mean one of the greatest seasons ever belonged to Beattie Feathers of the Chicago Bears. You remember him, right? He was the first 1,000 yard rusher back in 1934. In that magical season he ran for 1,004 yards with an average yards per carry of 8.4. However, his yards per game a mere 91.3.

And that LB-RB Marion Motley of the Cleveland Browns (1946-53) may have been better than his predecessor, Brown. Motley averaged 5.7 yards a carry for his career, easily ranking him first all-time among qualified backs. However, Motley averaged only 47.6 yards per game with the Browns.

So, if we decide to add yards per carry to yards per game, and sprinkle in lifetime achievements like rushing titles and career yards, we may find how to truly measure a running back's greatness. And that is just what I did.

Here are my top ten RBs of All-Time...

10. Chris Johnson, Tennessee Titans (2008-present). I know what you are thinking. He doesn't belong in the top 50 until he earns it. But hear the numbers out. Johnson has 6,888 yards in five years. He has recorded five straight 1,000 yard seasons. In 2009, he ran for 2,006 yards. He has a lifetime 4.7 a carry, which ranks him fifth on this list. His 87.2 yards per game ranks sixth. He is already 57th all-time is rushing yards. He belongs.

9. Bo Jackson, Oakland Raiders (1987-90). Despite playing only four seasons, and starting only 23 games, Bo makes the list. Bo averaged 5.4 yards every time he ran the ball, better than any other on this list. He had season long runs over 90 twice, and 88 in another year. Bo ran a 4.1 at the NFL combine. He was wicked fast, and maybe the most dangerous player of all-time. His career was cut short by injury. He would go on to be a major league baseball player. And a good one.

8. Earl Campbell, 2 teams (1978-85). Playing most of his career with the Houston Oilers, Campbell won the rushing title in each of his first three seasons. In the six full seasons Campbell was an Oiler, the team was 43-46-0 overall. He was so impressive to watch, a giant guy running over, through, and by anyone. He finished with 4.3 yards per carry, and 81.8 yards per game. Those numbers are skewed as he was little used in three of his final four seasons. His brutal approach to carrying a football was the cause for an early demise. Still, he ranks 31st overall in career rushing yards.

7. O.J. Simpson, 2 teams (1969-79). Simpson was with the Buffalo Bills for most of his career. The Bills were 43-81-2 during that time. During an era where most teams learned to use the pass as a weapon, Buffalo relied on running the ball. Simpson had four rushing titles in a five-year span (1972-76). He was the first to cross the 2,000 barrier in 1973 with 2,003 yards. The next closest rusher that year was John Brockington, only 859 yards away. O.J. averaged 4.7 yards per carry, and 83.2 yards per game over his career. Simpson ranks 18th overall in yards rushed.

6. Emmitt Smith, 2 teams (1990-2004). Smith is the all-time rushing leader at 18,355 yards. So why is he so low on this list? Smith averaged 4.2 yards per carry, and 81.2 yards per game. His was longevity as much as greatness. He did win four rushing titles in a five year span (1991-95). He had 11 straight 1,000 yard seasons. The Cowboys were 116-92-0 during his time there. He was great, but there were better...

5. Walter Payton, Chicago Bears (1975-1987). Payton played all 13 seasons with the Bears. Like Smith, he led them to the Super Bowl win. Payton averaged 4.4 yards per carry, and 88.0 yards per game. He finished with 16,726 yards, at that time the most ever. He would have won more than one title, but he happened to play during an era that included O.J. Simpson, Earl Campbell, and Eric Dickerson. His nickname was "Sweetness" and those that watched him would agree... he was. He had ten 1,000 yard seasons, only interrupted by the strike-shortened season of 1982 (9 games). In Payton's only season leading the league (1977), he won his rushing title by 579 yards.

4. Eric Dickerson, 4 teams (1983-1993). Dickerson was unique in that he is not associated with one team. He spent parts of five seasons with both the Rams and the Colts. He finished with 13,259 yards rushing, four titles including the all-time rushing mark of 2,105 in 1984. He had seven straight 1,000 yard seasons to start his career. He had over 1,800 in three of his first four seasons. Dickerson finished his career averaging 4.4 yards a carry, and 90.8 yards per game. He was a work horse that averaged over 100 yards per game in five of his first six seasons. But those seasons took a toll. In his final four years, had 2,033 rushing yards total in 45 games for the Colts, Raiders, and Falcons.

3. Adrian Peterson, Minnesota Vikings (2007-present). You have seen him for six years. His lifetime achievements are still waiting to unfold. At present, Peterson is 33rd all-time in rushing. His 5.0 yards per carry bettered by only Brown on this list. His 99.4 yards per game 3rd best. AP won the 2012 rushing title by 484 yards over Alfred Morris. This coming off of knee surgery that had many fearing for his career. He has two rushing titles in six years. He was runner-up to LaDainian Tomlinson in his rookie year. Minnesota is 49-47-0 in those six years. Maybe some homer-bias, but his numbers hold out.

2. Barry Sanders, Detroit Lions (1989-98). Sanders was the most elusive player I have ever seen. He won four titles in his ten years (1990,94,95,97), three after his fifth season. He lost a title in 1991 by five yards. He got better with age. His final rushing title included an MVP award. He was honored as much for his demeanor as his feats. Sanders finished with a 5.0 average yards per carry, and 99.8 yards per game average, both 2nd on this list. He left the game when he was within reach of Payton's all-time record, still fully capable. Detroit's losing ways had returned and he did not want to be a part of another rebuild. Sanders takes a backseat to no one, except...

1. Jim Brown, Cleveland Browns (1957-65). Many fans never saw him play, including me. So how does he keep ending up atop a list such as this one? Try eight rushing titles in nine years. Or 5.2 yards per carry, or 104.3 yards per game. He was a three-time MVP. He won the 1958 title by 791 yards over Alan Ameche, setting a new NFL record by 95 yards over Spec Sanders of the defunct AAFC, with 1,527 yards. He broke his own record in 1963, by 336 yards, with an 1,863 yard effort that stood until Simpson broke in ten years later. That year he bear runner-up Jim Taylor by 845 yards, or nearly double. Further, in 1963 he averaged 6.4 yards per carry. His final season, his ninth, he won the title by 677 yards over rookie Gale Sayers. And that just scratches the surface of his greatness.

There were serious absences from this list that deserve mention. All-time rushing leaders like: Curtis Martin, Tomlinson, Jerome Bettis, Tony Dorsett, Marshall Faulk, Edgerrin James, Marcus Allen, and Franco Harris to name a few. Other older generation rushing title holders like Steve Van Buren, a four-time title winner from the Philadelphia Eagles post-WW II. Or Joe Perry of the 49ers, the first to rush for 1,000 yard seasons back-to-back in 1953-54.

We will learn who is MVP in a short while. He will watch All Day's career unfold. But these are personal achievements, and should not outweigh the team matter at hand. This Saturday AP will once again have to prove to skeptics why a guy like me would value him so greatly.

AP Knows what it is all about...

or was that Bo.

Skol.