The Nationals announced (on Twitter) that they have designated right-hander Shairon Martis for assignment. The team had to create roster space for Jerry Hairston Jr., whose contract was approved by the league today.
Martis debuted for the Nationals in 2008 and started 15 games for the club a year later. In 106 1/3 innings compiled in 2008-09, the 23-year-old Curacao native has a 5.33 ERA with 4.8 K/9 and 4.3 BB/9. He spent the 2010 season at Triple-A Syracuse, where he posted a 4.09 ERA with 5.9 K/9 and 3.6 BB/9 in 152 innings of work.