Marlins acquired RHP Jarred Cosart, INF/OF Enrique Hernandez and OF Austin Wates from the Astros in exchange for OF Jake Marisnick, 3B Colin Moran, RHP Frances Martes and a 2015 compensation pick.
Cosart has posted a 3.57 ERA over his first 30 major league starts and is under control for a few more years, but his 4.13 FIP and 1.42 WHIP suggests that a regression is coming. He will at least get to pitch in a very pitcher-friendly park but isn't much of a fantasy option with his low strikeout rate.
Yankees designated 2B Brian Roberts for assignment.
Roberts managed to stay healthy this season, but he hit just .237/.300/.360 over 91 games and the Yankees decided to upgrade at second base with Stephen Drew. The 36-year-old will clear waivers and try to catch on elsewhere for the remainder of the season.
Red Sox acquired INF/OF Kelly Johnson from the Yankees for SS Stephen Drew.
Johnson was a popular fantasy sleeper in the spring, but unfortunately he kept dozing after Opening Day. He ended up hitting just .219 with a .304 OBP and six home runs in 77 games for the Yankees. Currently on the disabled list with a strained left groin, Boston won't rush him back. Slotted behind Brock Holt and Dustin Pedroia in the infield, and Shane Victorino and Allen Craig in the outfield, the tank of Johnson's 2014 fantasy value has run dry.