Michael Wacha has a 4.42 ERA since the end of May. Should we be concerned? Plus Lucas Duda, Jason Motte, Jace Peterson, and Jeff Locke.

Can Austin Jackson make a big second half push as he heads into free agency? Also Tillman, Y. Gomes, Cron, and E. Rodriguez.

J.D. Martinez is following up 2014's breakout with an even more impressive performance. He's on pace for 40+ HR—is it time to consider him an elite OF? Plus David Robertson, Kevin Pillar, Nate Karns, and Francisco Lindor.

Nathan Eovaldi boasts an 8-2 record for the AL East-leading Yankees, so why should we be skeptical of his success? Also, Eaton, Odor, N. Martinez, Heaney.

It's been a very disappointing season so far for Carlos Gomez, but is there hope he can return to form down the stretch? Plus, Wellington Castillo, Aramis Ramirez, Chris Heston, and Brad Ziegler.

Buster Posey is in the midst of yet another fine season. Is there any reason at all to be concerned going forward? Plus Jim Johnson, Wilson Ramos, A.J. Pierzynski, and Michael Lorenzen.

Jacoby Ellsbury was recently activated from the DL. Can he keep up his .300 BA and lead the Yankees to a pennant? Also Quintana, Kipnis, Feldman, and Trumbo.

Kris Bryant has been as advertised so far—including the whiffs. Plus Troy Tulowitzki, Yunel Escobar, John Axford and Jimmy Rollins.

Justin Verlander is back, but can he summon his inner ace or are his days of elite production now over? Also, De Aza, R. Martin, DeShields Jr., Montgomery.

Nolan Arenado, a popular breakout candidate heading into the season, has probably exceeded even the most lofty of expectations, and now looks like one of the top hitters in the game. Plus Kelly Johnson, Ben Revere, Carlos Martinez, and Jon Niese.

Carlos Gonzalez scuffled through the first two months, but he has been on fire of late. Can he keep it up? Plus Jeurys Familia, Adrian Gonzalez, Jeremy Hellickson, and Taylor Jungmann.