This article is part of our The Long Game series.
It happens every April. Like the swallows returning to Capistrano, or salmon swimming upstream to spawn, the great prospect migration of 2017 has begun, with big names like Cody Bellinger, Dan Vogelbach and Julio Urias already getting called up to the majors. MLB teams make no secret anymore about the fact that they're willing to delay the start of service time clocks for important parts of their future roster, so as April turns into May and then June, more and more players will make the leap from the minors to the big leagues.
Of course, the prospects have to hold up their end of the bargain too by performing, both in the minors and the majors, and that's where the following list comes in. The 14 players highlighted here are off to blistering starts for their minor-league teams, and while this is far from an exhaustive list of prospects who could get called up over the next couple of months, these are the players who seem to be pounding on the door the loudest, and thus demanding of the most attention from fantasy GMs, especially in shallow keeper and dynasty formats where players who aren't yet contributing in the majors are rarely worth roster spots. Whether their performance is enough to force their way onto the 25-man, or in some cases even the 40-man, roster is a question only their employers can answer.
Jorge Alfaro, C, Phi: The 23-year-old already got a brief taste of the majors