Rondon has some competition for saves in Chicago; Cardinals may need to tap into rotation depth; and more from around the division.

Zack Greinke has a sub-2.00 ERA and 11 PQS-DOM performances through his first 12 starts of 2015. Is he poised for a career year? Plus, Jorge de la Rosa, Ryan Zimmerman, Joc Pederson, and Brandon Crawford.

Devin Mesoraco sets his sights on returning in 2015... as a left fielder. Plus, checking in on Arismendy Alcantara, and what if Ryan Braun's thumb issue is worse than the Brewers are letting on?

Jacob deGrom has been one of the most dominant pitchers in the league in 2015, and has put to rest any doubts about his ability to repeat last year's performance. Plus, Ian Kennedy, Marcell Ozuna, Gregory Polanco, and Mark Reynolds.

Looking to put an ugly April behind him, Andrew McCutchen's bat has emerged, but the knee issue is putting his stolen base totals at risk. Plus, Matt Carpenter, Christian Yelich, Gio Gonzalez, and Jeremy Hellickson.

Randal Grichuk has seen regular at-bats since coming off the DL, but what happens when Jon Jay returns? Plus, checking in on Javier Baez and more.

Bryce Harper is on an absolute tear, and looks to be fulfilling the promise that was expected out of him since he was drafted first overall in 2010. Plus, Daniel Murphy, Brayan Pena, David Phelps, and Kyle Lohse.

Raisel Iglesias was very impressive in his second major league start, and it might not be long before he gets another shot.

Jorge Soler's strikeouts are up and home runs are down so far, but both numbers should improve in short order. Plus, Chase Utley, Lucas Duda, Shelby Miller, and Mike Fiers.

With the offense scuffling, Jung-ho Kang is seeing a little more playing time in Pittsburgh, and more from around the division.

Anthony Rizzo is flashing his wheels in 2015, adding to his already substantial value. Plus, Josh Harrison, Jason Heyward, Jordan Zimmermann, and Jason Marquis.