The Nationals outrighted Baldonado to Triple-A Syracuse on Wednesday, Maria Torres of The Athletic reports.
Baldonado was one of three pitchers cast off the 40-man roster Wednesday as the rebuilding Nationals look to open up space heading into the offseason. The 28-year-old lefty reliever reached the big leagues for the first time in 2020, appearing in 14 games while giving up 10 earned runs over 10.2 innings.
The Nationals selected Baldonado's contract from Triple-A Rochester on Wednesday.
Baldonado earned his first big-league call-up after he submitted a 3.23 ERA, 1.11 WHIP and 31:8 K:BB in 30.2 innings with Rochester following his promotion from Double-A Harrisburg. The 28-year-old lefty is expected to fill a low-leverage role out of the Washington bullpen in September.