(Scott Cunningham / Getty Images) (Scott Cunningham / Getty Images)

The Nationals officially placed starter Stephen Strasburg on the 15-day disabled list and recalled left-handed reliever Xavier Cedeno from Class AAA Syracuse. Cedeno, who was called up two weeks ago for a day and didn’t appear in a game, could likely be with the Nationals for two days as they need a starter for Saturday’s game. The Nationals added an eighth reliever after the bullpen was worn down in Wednesday’s 10-1 blowout loss to the New York Mets.

Right-hander Ross Ohlendorf is expected to start on Saturday for the Nationals against the Minnesota Twins. The Nationals have one open spot on the 40-man roster and that flexibility could allow them to call up Ohlendorf from Syracuse. To make room on the active roster, however, Cedeno could be the likely candidate to head back down to Syracuse after Friday.

Cedeno, 26, who was claimed off waivers from the Houston Astros in late April, has a 2.63 ERA in 14 games for Syracuse. The Nationals have drastically changed the composition of their bullpen since the start of the season. They opened the year with only one left-handed reliever and, at least for the next two games, have three. Before Thursday, three of the seven relievers — Fernando Abad, Erik Davis and Ian Krol, weren’t in the bullpen on opening day.