Bill Ladson at MLB.com reports that the Nationals have traded lefty Mike O'Connor to the Padres for a player to be named later. The Nationals reportedly made the move to clear roster space at Triple-A Syracuse, though it's unclear who would take his spot.
The 28-year-old O'Connor was once considered one of the top Nats pitching prospects. It's not certain where he'll fit in to the Padres' plans just yet. He hasn't pitched since last year, but has accumulated a 5.45 ERA and a 63/56 K/BB ratio in 114 major-league innings.