yahoo rankings arent the same as some other rankings and mock drafts because yahoo looks strictly at historical stats while other rankings are forward looking. yahoo rankings arent completely useless so long as you understand what they mean and how they measure things. they arent that great as draft cheat sheets because guys with one good season (like loaiza) will be ranked really high (higher than most of us would consider drafting him anyway) and guys that missed time due to injury (like nevin and hoffman) will be ranked really low. guys with little or no stats (like harden) will also be ranked low. this is because they dont take into account subjective things like down years, being the magic age of 27, fluke seasons, injuries, getting traded to the yankees or rockies, or whatever. these things affect the players value but arent accounted for in yahoo rankings because yahoo looks strictly at the numbers the player actually achieved, not should have or could have.
yahoo rankings are decent for measuring a players in-season performance. they measure how well the player is performing relative to the other players. so for hitters they rank each player by avg, then by homeruns, then by rbi, and so on and then give an equal weight to each category ranking. it is up to the manger to determine the subjective things: if said player will continue that performance, do better, or do worse.
i havent looked into it in too much detail but i think there is a flaw in how they rank relievers though. i think they just assume an equal weighting for a relievers ratios compared to a starters. but since a reliever doesnt pitch as many innings his low era and whip dont have the same effect on your team as a starter with the same era and whip. for this reason you would merely just look at the rankings for relievers separately.
now dont get me wrong, i dont base trades or a players worth on yahoo rankings. i am merely saying that most people here seem to think they are something that they are not. they arent completely useless so long as you know what they are designed to measure. if you want to use them for pre draft stuff then print out the rankings and make adjustments based on injuries, fluke seasons, trades, and whatever other things you want. if you want to know about who is playing well during the season just sort by the last month then do a little investigation - is the guy injured, did he just have road trip to coors and milwaukee, did the glendon rusch factor inflate his stats, and so on. the rankings are a tool and so long as you use the tool the right way you wont have any problems. you dont try to cut down a tree with a screw driver do you?
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