Nolan Arenado is hitting .284 with 10 HR at the hot corner in Colorado. Is this former top prospect turning into a fantasy stud? Plus Mat Latos, Everth Cabrera, Vance Worley, and Travis d'Arnaud

Hisashi Iwakuma (RHP, SEA) has pitched like an ace without much fanfare, so is there any reason to be wary of his success? Also, Archer, Zobrist, Swisher, Shoemaker.

Matt Kemp is finally heating up, but can he be the player he was a few seasons ago? Plus Freddie Freeman, Aroldis Chapman, Matt Holliday and Arismendy Alcantara.

The Red Sox continue to depend on Mike Napoli for power, even as they continue to fade in the AL East. Also Street, Vogt, Capuano, and Singleton.

Buster Posey is having another productive season behind the plate, but his BA is on pace to be his lowest since 2011. Cause for concern? Plus Jorge de la Rosa, Jay Bruce, Jenrry Mejia, and Luis Valbuena.

Elvis Andrus hasn't quite lived up to his billing as a top SS option—is it time we re-adjust our expectations? Also, Weaver, Calhoun, Zunino, Betances.

Michael Brantley has blossomed into an elite producer in his fourth full MLB season. Can we expect it to continue?

Is Corey Dickerson a budding star? Matt Adams? What's Ervin Santana's future? We'll attempt to answer that here.

David Ortiz continues to defy Father Time, posting solid numbers as he approaches 40. Also Hammel, Hardy, Nathan, and Plouffe.

Khris Davis is quickly approaching 20 HR in his first full MLB season. Do the skills support it? Plus Henderson Alvarez, Lucas Duda, Eric Young, and Odrisamer Despaigne.

Jose Reyes is on the wrong side of 30 coming off an injury shortened season—is he still near the cream of the SS crop? Also, Lackey, Dickey, Hunter, Gomes.