Here's a stat for you...
Running ball is partially an offensive line, and partially the running back. There are few running backs, I MEAN FEW, running back in history that have been able to run well with out a good offensive line. Actually I can think of only one, the great and probably the greatest running back of all time, Barry Sanders. I know his stats are short because of his early retirement, but don't discredit the guy for wanting to be able to have a healthy retirement. The guy is the ONLY guy I have ever seen who can have the whole line cave in around him and come out and create yards. Not even the hyped up Reggie Bush can do that.
It has been shown through out the years, when a Running Back goes from a good line to a bad line, or a line looses a few key players, that RB looses production. Believe me, Adrian Peterson is not a Barry Sanders. Adrian Peterson is lower the boom type of running back. He's not a make you miss guy. If you stuck Adrian behind a bad Offensive line, that guy isn't getting near 2000 yards rushing. He's not going to average less than 3.5 yards a carry like TR, but he's not getting near 2000 yards.
To me here's the thing. Trent came in and had a crappy offensive coordinator. Then they get a new Coordinator, and basically start from scratch. To me, I think Trent didn't like being a Cleveland Browns player. I think he gave up. He came from winning a NC at Alabama, to a non contender in Cleveland. He doesn't know this situation. All Trent knows is WINNING, to quote Charlie Sheen. There is no way with a man of his talents that he can't will himself to get 4 yards a carry. The guy is what 5'9" tall and 225 lbs. This guy can't get close to 4 yards a carry. To quote Skip Bayless, ARE YOU KIDDING ME. This guy ran havok on the SEC and he can't produce in the NFL, seriously. Believe me, I watched this guy play, he has vision, and he hit the hole hard at Alabama. He's in the NFL, and he can't show the same patience and tenacity when he played at Alabama.
This tells me he's not trying. So what does Cleveland do, they trade him. Usually when you trade someone you get a few picks, 2nd and a 3rd. Cleveland was able to get a FIRST round pick for the guy. This was a brilliant move by Cleveland. Get rid of a guy who's basically dead weight, ship him off to a contender in Indy, were I will say this, he will get better stats. This was a win win move.