Wagner had been in extended spring training in Peoria, Arizona.
Wagner is a career .275 hitter with 65 doubles, 31 homers and 164 RBIs in 319 games.
Nic Crosta hit the disabled list with "chronic fatigue" and it is unclear when he will be available to come back. Crosta was hitting .196 with five homers and 15 RBIs in 15 games for the Storm. A week ago, he smashed three homers in the span of two games, collecting six hits over that span but had gone 1-for-12 since.