Jack’s Mannequin will be on board for most gigs through August 13, after which O.A.R. will play a number of shows with Dave Matthews Band into September.

Jack’s Mannequin is fronted by Something Corporate vocalist/keyboardist Andrew McMahon. The group was originally supposed to tour last summer behind its debut album, Everything In Transit, but those plans were shelved when McMahon was diagnosed with leukemia.

After weeks of chemotherapy and frightening bouts with pneumonia and shingles, McMahon’s leukemia went into remission and Jack’s Mannequin is now back on the road, headlining clubs and colleges through late April before heading out with O.A.R.

O.A.R. has already logged a healthy amount of tour dates this year, having covered the East Coast, South and Great Lakes region throughout February.