The Mets will receive minor league second baseman Dilson Herrera and a player to be named later, according to MLB.com's Anthony DiComo (on Twitter).
Herrera, 19, is having a strong season at Class-A West Virgina. The Colombian infielder is hitting .265/.330/.421 with 11 homers and 11 stolen bases in 479 plate appearances. Herrera ranked as the No. 20 prospect in the Pirates system prior to the season, according to Baseball America, and his solid play in 2013 has him currently ranked 11th among Pirates prospects by MLB.com's Jonathan Mayo.
In their scouting report, BA noted that Herrera has plus speed and surprising power for someone of his size (he's listed as 5'10" and 150 pounds) with the ability to hit the ball to all fields. BA feels that his lack of arm strength will limit him to second base, and Mayo agrees. Mayo adds that Herrera had no problem adjusting to the game after coming to the United States, and he projects an above-average hitter and well-above average runner. Mayo also ranked Herrera as the ninth-best second base prospect in all of minor league baseball.