Here is a analysis of the Patterson transaction at the link:
Here is a sample paragraph:
"Patterson was the 3rd overall pick of the 1998 MLB draft. Obviously, he was once considered a high prospect. He played great in the minors and made his way to the bigs by the end of the 2000 season. For the first couple of years in the majors he was never really able to put it together, but he did manage to have a .840 OPS season in 2003. In 2003, he hurt his knee in his best season of his career and was only able to play in 83 games. Since then, his numbers have begun to decline which is strange since he will only be 28 years old this season. The most significant decline has been in power. If he can regain his 20+ homerun power to go with his 35+ stolen base speed, he can be an asset to any team."