This article is part of our The Long Game series.
While it didn't happen exactly as everyone thought it might, Ronald Acuna received his promotion to the big leagues this week, joining prospects like Gleyber Torres, Scott Kingery, Tyler O'Neill and Lourdes Gurriel in making their MLB debuts through the first few weeks of 2018.
Whether you're playing in a keeper or dynasty format, or a re-draft league deep enough that's it's worth stashing minor leaguers who could make an impact in the majors, all these promotions naturally prompt a question. Who's next? Which kid is going to be the next one to get called up and supply an adrenaline shot of fantasy value to a needy roster?
Below is a list of prospects – some among the game's elite, some found a little further down in RotoWire's Top 400 rankings – who have at least semi-plausible paths to the Show this season. Whether they're worth picking up now depends on your league depth, available bench spots, roster needs and ability to stay patient and wait for them to get promoted, but all of these guys should probably be on your radar in case they suddenly appear in your free-agent pool.
Vladimir Guerrero Jr. / Bo Bichette, Blue Jays: It just seems right to list these two together, as they'll likely continue their ascent in the Jays' system together and it wouldn't be a surprise to see them debut as a duo, either. Both sons of former major leaguers and both in RotoWire's fantasy prospect top