Karalexis was forced to withdraw from the bout due to a hand injury, according to the WEC’s announcement. A timeline for his return was not released.
Kerr (7-1) has won four-straight, but has not fought since a unanimous decision over Marc Stevens last September.
Shalorus (4-0-1) remained undefeated in June with a second-round TKO of Justin Miller.
WEC 44 airs live on Versus and is headlined by featherweight champion Mike Brown vs. Jose Aldo.
Pictured: Alex Karalexis