Minor Moves: Ryan Buchter, Wirfin Obispo, Felix Pie, Simon Castro

Here's your list of today's outright assignments and minor moves from around the league…

• The Braves have added two minor league relievers — lefty Ryan Buchter and righty Wirfin Obispo — to the club's 40-man roster, per the International League transactions page. The move was designed to prevent both pitchers from qualifying for minor league free agency. Buchter, 26, fanned 15 batters per nine innings last year in 62 Triple-A innings to go with a less-flattering 7.4 BB/9, and ended up with a 2.76 ERA. The 29-year-old Obispo, meanwhile, put up 9.9 K/9 against 4.9 BB/9 in Gwinnett over 63 2/3 innings of 3.53 ERA ball. Both could get a look for an MLB bullpen role in Spring Training.
• The Pirates have outrighted Felix Pie off their 40-man roster, and the outfielder has elected free agency, according to Rob Biertempfel of the Pittsburgh Tribune (Twitter link). The 28-year-old former top prospect hit just .138/.194/.172 in 31 plate appearances for the Pirates in 2013 and slashed .251/.321/.390 in 396 plate appearances at Triple-A Indianapolis.
• The White Sox have outrighted right-hander Simon Castro to Triple-A Charlotte, removing him from the 40-man roster, the team announced on Twitter. Castro twice appeared on Baseball America's list of Top 100 prospects as a Padres farmhand and found himself headed to Chicago as part of the Padres' trade for Carlos Quentin. Though he was sharp in his big league debut this season, totaling 6 2/3 innings in the Majors, Castro limped to a 5.83 ERA in 92 2/3 innings at Charlotte.

Jeff Todd contributed to this post.