Keller (back) is making progress but isn't ready to return to action. "He's a little ways away from that," head trainer Todd Tomcyzk told the Pittsburgh Tribune-Review on Wednesday.
He continues to receive treatment for lower back tightness. Keller has compiled a 2.92 ERA, 0.93 WHIP and 39:8 K:BB for High-A Bradenton in 40 innings. Despite his injury -- which has sidelined him since May 16 -- there's still a decent possibility he advances to Double-A before the end of the summer.