MLB trade rumor season doesn't really heat up until the calendar flips to June, but as Memorial Day approaches, we are beginning to get an idea of what some of the main storylines will be in advance of July 31.

Pittsburgh Pirates starting pitcher Paul Skenes has already surfaced in MLB rumors as a potential trade candidate, as arguably the

With the team's extreme struggles, the Pirates could be expected to become sellers at this year's trade deadline. Bleacher Report 's Tim Kelly is predicting Tommy Pham, Dennis Santana, Isiah Kiner-Falefa and Joey Bart are Pirates players he can see the team moving this summer. Skenes, for him, is not.