From Rotoworld:

The Pirates have clinched the No. 1 pick in next June's First-Year Player Draft.

The Pirates are 56-101 this season while the Mariners are 61-96. They can still tie for the majors' worst record, however the Pirates hold the tiebreaker advantage for the No. 1 pick since they had the worse record last season. Early buzz has Rice third baseman Anthony Rendon as the top overall talent in next year's draft class, though he is currently recovering from a major ankle injury.

So does this seal the fate of Pedro Alvarez as a 3B or was that already a foregone conclusion?