The baseball simulations are currently in beta state only. Although the ELO rating simulation code has a good predictive ability, it is important to remember that the simulations will perform worse at the start of a season. ELO is an inherently lagging indicator and the baseball off-season includes changes in personnely and player ability. Also, late season performance from last year will have and undue influence on the ELO rating for teams in April.
Hopefully a way to minimize this issue can be found. Until then, take these pre-season predictions with a grain of salt. I know I don't believe the Orioles and Nationals will average 105 wins next season.