In this issue of Blood, Appelmann et al provide evidence for prolonged survival and prevention of resistance in a mouse model of Philadelphia chromosome-positive (Ph+) acute lymphoblastic leukemia (ALL) by combined targeting of the BCR-ABL kinase and Janus kinase 2 (JAK2) with dasatinib and ruxolitinib, respectively. © 2015 by The American Society of Hematology.