To clear space for one lefthanded reliever on the 40-man roster, the Phillies removed another.
Sergio Escalona was designated for assignment Saturday to make room for the signing of J.C. Romero.
Escalona, 26, had a 3.81 ERA at double-A Reading in 2010. He struck out 53 in 54 1/3 innings and allowed just 46 hits.
He reached the majors in 2009 and pitched in 14 games with a 4.61 ERA. But he had a disappointing 2010 spring training and could not reach triple-A Lehigh Valley in 2010.