Miller allowed one run on six hits and a walk in four innings. He struck out two. Three of those hits, Miller said, came in succession during his final inning of work -- all on a cutter that Miller said was having a tough time breaking in windy conditions.
Conversely, Miller described his curveball as the best it has been this spring.
"I figured my grip out and got my arm where I wanted it to be," Miller said. "That pitch is coming along way better."
In his four Grapefruit League starts, Miller allowed nine earned runs on 12 hits in 13 2/3 innings. He walked six and struck out 13.
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, and follow her on Twitter @LangoschMLB. This story was not subject to the approval of Major League Baseball or its clubs.