Jordan Zimmermann likely will avoid going back on the disabled list after getting positive results from his MRI, according to a source.

Zimmermann, who started Thursday for the first time since June 30, was pulled after giving up six runs in just 1 2/3 innings, which matched the shortest outing of his career.

Brad Ausmus said Zimmermann was experiencing tightness in his lat muscle and was sent for tests by the Detroit Tigers.