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For 90%+ of fantasy baseball players, using the BP Player Forecast Manager would result in a successful or even highly successful season.
Maybe more than 90%, considering the competition on the national level :- )
In the *typical* roto league, we 'net rats don't have time to do a better job than PECOTA in projecting (say) J.J. Hardy or Brandon Morrow, if he is out-of-area.
By the time we zero in on a guy -- Hardy or Hall or Bay or Fister -- we'd better be able to capture more information than PECOTA has.
GM's of course have that time, via their staffs.