The Padres designated lefty Aaron Poreda for assignment to clear a spot on the 40-man roster for starter Anthony Bass, reports Sarah Trotto of The Arizona Daily Star.
Poreda, 24, had a 7.31 ERA, 9.6 K/9, 9.3 BB/9, and 0.3 HR/9 in 32 innings for the Padres' Triple-A club this year. Most of the innings came in relief, a role he's been in for the majority of his Padres career. The former first round pick was the key component in Kevin Towers' July 2009 deal that sent Jake Peavy to the White Sox, though Clayton Richard has emerged as the more valuable piece. The Padres also received Adam Russell, who was later sent to the Rays in the Jason Bartlett trade.
Poreda was ranked tenth among Padres prospects prior to the 2010 season by Baseball America. Even then there were concerns about his delivery and control, but he was still considered worthy of a late-inning bullpen future. Since then Poreda has walked more than a batter per inning.