Tigers' Grayson Greiner suffers setback, shut down indefinitely; Josh Harrison on way back

Grayson Greiner's rehab assignment hit a roadblock in Lakeland. (Photo: Robin Buckson, Detroit News)

Kansas City, Mo. — Grayson Greiner’s road back to the Tigers just got significantly longer.

Greiner, who began the season as the primary catcher, was pulled off his rehab assignment in High-A Lakeland after his lower back flared up on him again.

“He had a setback,” manager Ron Gardenhire said before Friday's game against the Royals. “It’s the same back issue, but it’s to the point now where he’s not going to be able to play for a while.”

Greiner, who last caught a game for the Tigers on June 13, had played four games at Lakeland and was 0-for-9 in 13 plate appearances. He was hitting .162 when…