Trevor Bauer has had a tremendous first half of 2018. How has he done it? Is it sustainable?

After batting .265 with 16 HR in 279 AB a year ago, Jesus Aguilar has fared even better in 2018, compiling a .302 BA and 17 HR in 205 AB. Plus, Ian Desmond, Wade Davis, Manny Margot and Brent Suter.

Ross Stripling began 2018 in the bullpen, but injuries opened the door for him to join the starting rotation on April 30 and he hasn’t looked back, delivering a stellar 2.37 ERA in ten starts (1.99 ERA overall). Do the underlying metrics support this newfound level of excellence? Plus, Anthony Rendon, Scooter Gennett, Vince Velasquez and David Peralta.

Miles Mikolas owns a superb 2.43 ERA through 85 IP in 2018. Can he keep it up? Plus, Matt Kemp, Kyle Barraclough, Johan Camargo and Gorkys Hernandez.

After posting a 4.32 ERA and 1.57 WHIP in 100 IP as a rookie, Sean Newcomb owns a 2.49 ERA and 1.19 WHIP through 69 IP in 2018. Do the underlying skills support the massive leap in performance? Plus, Jose Martinez, Ian Happ, Zack Wheeler and Daniel Descalso.

Jake Arrieta owns a sparkling 2.22 ERA in 138 IP (24 starts) since July 1, 2017. Is he again worthy of the “ace” label? Plus, Yasiel Puig, Luke Weaver, Brandon Nimmo and Adam Duvall.

Fantasy owners were all-in on Bryce Harper heading into 2018, and while the 15 HR are a welcomed sight, the unsightly .232 BA has been a disappointment. Plus, Kenta Maeda, Jason Heyward, Jeff Samardzija and Cameron Maybin.

Is this the year Kyle Schwarber finally puts it all together and delivers on the upside that once made him a highly-regarded prospect?

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.

Zack Godley enjoyed a breakout season in 2017, posting a 3.37 ERA in 155 IP, but things haven't gone nearly as well for him in the early stages of 2018. Is there reason for concern? Plus, Matt Carpenter, Josh Bell, Jarlin Garcia and Adrian Gonzalez.

Jon Gray owns a disappointing 4.99 ERA through his first 40 IP of 2018. Should fantasy owners be concerned? Plus, Marcell Ozuna, Nick Ahmed, Tyler Chatwood and Addison Russell.