This week, we filter for the top BPIs to date, and then compare to the rest-of-season projections.

Luis Castillo entered 2018 with lofty expectations following a tremendous rookie season, but he owns a horrid 6.02 ERA through 46 IP. Can he right the ship? Plus, Rhys Hoskins, Odubel Herrera, Jose Urena and Scott Schebler.

On the surface, it's been more of the same for Vincent Velasquez in the early part of 2018. But a look under the hood reveals several reasons for optimism.

Tommy Pham is picking up where he left off in 2017, while Nick Markakis is turning back the clock 10 years. Can they maintain their current level of production? Plus, Cesar Hernandez, Brad Boxberger, and Michael Wacha.

Let's shine our weekly spotlight on the emerging Blake Snell, a former top pitching prospect who is starting to turn his upside into results.

Rick Porcello flashers career-high skills. Stephen Piscotty tries to recover from a slow start to 2018, plus Kyle Seager, Mike Minor, and Yonder Alonso.

Sanchez is cranking HRs as expected, but his batting average has been a drag. Plus, Dixon Machado, Dylan Bundy, Nick Castellanos and Charlie Morton.

Alen Hanson has put his former upper-tier prospect pedigree on display after his recall from the minors.

Christian Villanueva stunned many with a .338 BA and eight HR in April, but has stumbled since—what should we expect going forward? Plus, Caleb Smith, Carson Fulmer, Colin Moran and Lewis Brinson.

Back-to-back scoreless outings by Twins rookie Fernando Romero to start his career has evoked memories of another Fernando who once took the baseball world by storm and has fantasy owners rushing to grab him. Should you join the crowd?

Five pens where you might look to speculate.