Wednesday's apparent Carlos Beltran trade between the New York Mets and the San Francisco Giants looks to be all but complete, as it's just up to Beltran to give his approval. The big question remaining is what the Mets will get in return for the star outfielder. There was some disagreement earlier on, but now, multiple sources are saying that Zack Wheeler - not Gary Brown - is the top prospect going the other way.

Buster Olney has it, Joel Sherman has it, and others have it, too. It's unclear whether the Giants will be sending other players along with Wheeler, but Wheeler does look to be the big piece.

Who is Zack Wheeler? Wheeler is a 21-year-old righty selected sixth overall in 2009. Baseball America ranked him the No. 49 prospect before 2010 and the No. 55 prospect before 2011, and he works predominantly off of a low-90s fastball and a solid curve. His changeup is coming along, as changeups usually are. With advanced-A San Jose this season, Wheeler has thrown 88 innings, with 47 walks, 98 strikeouts and a bunch of groundballs. His command could use some work, but the stuff is there for Wheeler to become an impact arm down the road.

It's a good return for the Mets in exchange for a player who was no longer of any use. As for the Giants, while Wheeler is a hefty price to pay, it's not like the organization is short on pitching, and they have higher priorities than worrying about the future anyway.