Projections do not favor players who are past their primes. They are appropriately harsh in projecting older and injury prone players. For example, the FanGraphs projections have Kershaw pitching only 91 innings next year. It is fair to say that they are tough on young unproven players. On the other hand, most unproven players never prove themselves. Because of the variation in possible results, teams depending on a lot of young players are tough to project. The weakness of projections is that they don't do a great job projecting players who are difficult to project!