On November 5, 2017, at Bound for Glory, Callihan made his debut for Impact Wrestling as a villain by interfering in a 5150 Street Fight for the World Tag Team Championship, helping Ohio Versus Everything (Dave and Jake Crist) defeat Santana and Ortiz of The Latin American Xchange (LAX) to retain the title. Callihan and The Crist Brothers then formed a faction named Ohio Versus Everything (oVe), where they started a feud with LAX. On the December 14 episode of Impact, Callihan would light a fire flame in the face of Konnan after a face to face summit. On the January 18, 2018 episode of Impact, oVe would then challenge LAX in a Barbed Wire Massacre match, where they lost the match, thus ending the feud. Callihan shortly after became the leader of oVe. Callihan made his pay-per-view debut for Impact at the Redemption event on April 22, 2018 where oVe defeated Eddie Edwards, Moose and Tommy Dreamer in a House of Hardcore match. oVe began a lengthy feud against The Lucha Brothers (Pentagón Jr. and Fénix) in the summer of 2018, which led to a mask vs. hair match between Callihan and Pentagón at Slammiversary XVI, which Callihan lost, which led to Callihan's hair being shaved off by the Lucha Brothers. Callihan and Pentagón had a rematch on the August 23 episode of Impact, a Mexican Death match, which Callihan won. The rivalry continued between the two teams with Brian Cage joining the Lucha Brothers in the feud. This led to an oVe Rules match pitting oVe against Cage and the Lucha Brothers at Bound for Glory, which oVe won when Callihan pinned Cage. This win earned Callihan, his first title shot in Impact Wrestling against Cage for the latter's X Division Championship on the November 15 episode of Impact, which Callihan lost.
