Third to first

Nate Jones will test his strained left glute against the D-backs on Saturday. Scott Downs also is scheduled to work in relief, marking the first Cactus League appearance for both. The veteran Downs doesn't need as many appearances to get ready, says Ventura.

Tyler Flowers' throw on a Brayan Pena stolen-base attempt in the fourth inning Friday sailed into center field when neither Alexei Ramirez nor Gordon Beckham covered second. Ventura called the mishap a miscommunication, but an unacceptable one.

"That can't happen," Ventura said. "So it was handled. Somebody has to be there."

Adam Eaton has reached base in six straight plate appearances, including getting hit by an Aroldis Chapman pitch on the right shoulder Friday. It was his left elbow sporting an ice pack after the game, but Eaton said it was a precautionary measure.

Ronald Belisario, who has been absent from camp due to a visa issue in Venezuela, reportedly is on his way to Arizona and could arrive by Saturday. According to Cooper, Belisario will throw a bullpen session as soon as he gets settled.

Scott Merkin is a reporter for MLB.com. Read his blog, Merk's Works, and follow him on Twitter @scottmerkin. This story was not subject to the approval of Major League Baseball or its clubs.