3 Up, 3 Down: The Biggest MLB Fantasy Questions of the Week

Here are three burning questions affecting MLB fantasy players this week:

Which slumping Blue Jay should you buy low?

Josh Wegman: Josh Donaldson is currently going through his worst stretch as a member of the Blue Jays. He is hitting just .200 with one homer and one RBI in the month of May. Someone in your league who burned a top-5 pick on Donaldson may be willing to move him. As soon as the bats behind him start heating up, the 2015 AL MVP will surely do the same.

Jason Wilson: Donaldson for cheap is a pipe dream. If his struggles persist past June, maybe, but not yet. Since SS Troy Tulowitzki is already showing signs of life, his buy-low time is past. It has to be OF Jose Bautista. He's still walking at an incredible rate. He had just as many home runs at this point a year ago, but the low batting average will cause panic.

James Bisson: Donaldson may be the best buy-low candidate in baseball right now - that is, if anyone is actually selling. His batted-ball profile suggests that the only thing wrong with his swing is that it isn't producing hits - but with his medium- and hard-hit rates holding steady and his non-groundball percentages still high, it's only a matter of time before he returns to form.

Which prospect should fantasy owners be stashing?

Josh Wegman: The back-end of Pittsburgh's rotation consisting of Jon Niese, Jeff Locke and Juan Nicasio are all on thin ice. Pirates top prospect Tyler Glasnow gets all the headlines, but he has had control issues. Jameson Taillon has a 43:5 K/BB ratio in 43 1/3 innings with a 2.08 ERA and a 0.81 WHIP in Triple-A. His stuff is electric; he could get the call before Glasnow.

Jason Wilson: Many top prospects are already stashed in keeper leagues, but Houston Astros infield prospect Alex Bregman is still readily available. Originally a SS blocked by incumbent Carlos Correa, Bregman has started playing games at 3B. He may be at Double-A, but with seven home runs and a .310 batting average, he won't be for long. The path is not as clogged for 3B.

James Bisson: With the clock (hopefully) ticking on Danny Espinosa's time as the starting shortstop for the Washington Nationals, fantasy owners should keep close tabs on Trea Turner. The 22-year-old has had a blistering start to his Triple-A campaign, slashing .319/.381/.464 with three homers and 14 steals in 155 plate appearances. He should be up with the big club soon.

Should fantasy owners stash Jose Reyes?

Josh Wegman: The Rockies are trying to trade Reyes, which won't be easy considering his contract. If he's dealt, he loses the Coors Field advantage. If he stays, he will struggle to stay in the lineup considering Colorado's infield depth. The only scenario that makes him worth stashing is if 3B Nolan Arenado, SS Trevor Story or 2B DJ LeMahieu suffers a long-term injury.

Jason Wilson: Quick answer, no. At 32, the speed will continue its decline. He might not even play as it is. While he might be tempting based on name recognition, the uncertainty around his role with Colorado is too tenuous. Picking him up is basically counting on a trade, which isn't a guarantee. Don't waste a roster spot.

James Bisson: With Reyes' playing status up in the air, fantasy owners should look elsewhere. There are simply too many variables in play here; if the Rockies can't trade him, they may not feel compelled to play him. And even if they do find a willing partner, how is he going to perform having missed more than a third of the season? Don't bother with Reyes.