Cedeno, 26, posted an 11.37 ERA over five appearances spanning 6 1/3 innings with Houston this season.
He allowed 10 hits and 11 runs (eight earned) with seven walks, three strikeouts and hit two batters.
Last season, Cedeno's numbers were far better. He worked in 44 games with the Astros, putting up a 3.77 ERA over 31 innings. Cedeno allowed 30 hits, walked 14 and struck out 36.
He'll now join fellow Puerto Rican J.C. Romero at Syracuse. Both left-handed relievers were a part of Puerto Rico's bullpen in the World Baseball Classic.
Romero, for what it's worth, has appeared in seven games with Syracuse so far this season, allowing six hits and one unearned run. He's walked none and struck out eight.
The Nationals will run out the same eight position players tonight that we saw last night against the Cardinals.
Anthony Rendon will get his third straight start at third base, hitting sixth.
The Nats will face Cardinals ace Adam Wainwright, who is off to a strong start to 2013. The right-hander has gone 3-1 with a 2.48 ERA through his first four starts.
Ross Detwiler will get to face his hometown team yet again tonight. Detwiler's last regular season start of 2012 was in St. Louis, and it didn't go too well, as the lefty went just 2 1/3 innings, allowing seven runs (three earned) on four hits with five walks.
He responded by shutting the Cardinals down in Game 4 of the National League Division Series, however, allowing just one unearned run over six sparkling innings in a must-win game for the Nats.
Detwiler has been the Nats' most consistent and effective starter this season, putting up a 0.90 ERA with an 11-to-3 strikeout-to-walk ratio through three outings.
For the Nats
CF Denard Span
RF Jayson Werth
LF Bryce Harper
1B Adam LaRoche
SS Ian Desmond
3B Anthony Rendon
2B Danny Espinosa
C Kurt Suzuki
LHP Ross Detwiler
For the Cardinals
CF Shane Robinson
1B Allen Craig
LF Matt Holliday
RF Carlos Beltran
C Yadier Molina
3B David Freese
2B Matt Carpenter
SS Pete Kozma
RHP Adam Wainwright