Escalona was designated for assignment by the Phillies last week.
He was 4-8 with a 3.81 ERA in 50 appearances with 10 saves at Double-A Reading las year. He has made 24 appearances in the Venezuelan Winter League for La Guaria, going 0-0 with a 3.94 ERA.
He was 1-0 with a 4.61 ERA in 14 appearances for the Phillies in 2009.
The 23-year-old Cartwright hit .294 in a combined 127 games for Class A Lancaster and Double-A Corpus Christi last season with 10 homers, 55 RBIs and 31 stolen bases.