The veteran rockers cut short their 2015 tour after the singer was struck down with crippling joint pain linked to arthritis, and he has now undergone an operation to fix the problems.

Keith is recuperating ahead of planned rehearsals for Tesla's shows on an upcoming rock cruise and a summer (15) tour with Def Leppard and Styx.

A message posted on the band's page reads, "Tesla lead singer JK has made a full recovery from his hip replacement surgery, he is enjoying some much needed rest and relaxation at this time. The band will resume rehearsals for the Monsters Of Rock Cruise next week and run through a set of songs from their latest album Simplicity. The 2015 tour was cut short due to pain resulting from arthritis in JK's hip, and the band had to make a quick decision to get him into surgery in order to be ready for the tour this summer."