The rookie right-hander will make his first career big league start on Wednesday afternoon against the Phillies, taking Teheran's spot in the rotation for the immediate future.
Teheran has gone back to Atlanta to receive treatment for an infection in his right thigh, and the team is hopeful that he can return for a weekend start against the White Sox.
While this doesn't seem serious, if the infection forces Teheran to be sidelined for more than a few days, the All-Star break is next week, allowing him more time to recover.
Jenkins has appeared in four games out of the bullpen, posting a 5.