It's still only April, but it's never too early to survey the MLB landscape for the latest rumors, buzz and news.

In some cases, it's the big-ticket free agents—left-handed starter Dallas Keuchel and right-handed closer Craig Kimbrel—who somehow remain unsigned and which teams might snap them up.

In others, it's way-early trade speculation ahead of the July 31 deadline, news about a fast-rising prospect and the impending June amateur draft or simply the hottest storyline simmering with each squad.

Arizona Diamondbacks: Zack Greinke Could Be Moved at the Trade Deadline

In December, Bob Nightengale of USA Today reported the Arizona Diamondbacks believed they were likely to get better trade offers for right-hander Zack Greinke at the trade deadline as opposed to during the offseason.