MINNEAPOLIS -- The rehabilitation assignment for Toronto Blue Jays closer Casey Janssen has been halted because of lingering tightness in his lower back.
Janssen has been on the disabled list since the start of the season. He pitched for Class A Dunedin Tuesday, but according to manager John Gibbons he didn't feel better afterward and was told to take a few days off from throwing.
Gibbons said before Thursday's doubleheader at Minnesota he didn't believe the right-hander had a setback. But the manager said Janssen has continued to experience discomfort.
Sergio Santos has handled the ninth-inning role in Janssen's absence.
Shortstop Jose Reyes is expected to rejoin the Blue Jays on Saturday at Cleveland. He strained his left hamstring in his first at-bat this season.