Byrnes (fractured left hand) may wind up being the first one to come back depending on how quickly his hand can handle swinging the bat every day.
"I want him to get healthy and get some at-bats and get him swinging the bat the way we know he can," D-backs manager A.J. Hinch said. "Depending on how his hand reacts, we'll see how much volume he can handle and whether or not it takes it all the way until Sept. 1 when we expand the rosters or if he makes it back before that."
Upton (strained right oblique) threw for the first time Friday and is doing some rotational drills. The club hopes he can begin a rehab assignment during an upcoming 10-game road trip.
Jackson (Valley Fever) was 0-for-10 in his first three games for Class A Visalia. The fatigue caught up with him a bit Friday and he took the day off.
"I think he's felt the effects of being off for so long," Hinch said. "He was pretty lethargic [Friday]. I think postgames he's pretty exhausted."
Young was sent down for production rather than health issues and he went 4-for-5 in his first action Friday.
"Good first night for him," Hinch said. "We're all noticing. He showed up on the right foot and with the right attitude and got after it [Friday] night."
ARI: RHP Yusmeiro Petit (2-6, 5.87 ERA)
Petit could not follow his two exceptional starts with a third, as the red-hot Nationals pounced on him for nine hits and four runs -- three earned -- in four innings. Petit was lifted from the game for a pinch-hitter in the top of the fifth, ending his afternoon at 83 pitches. "I struggled with command," Petit said. "I was leaving the ball up at the plate and they hit it. My command on both sides was not working good."
LAD: LHP Randy Wolf (6-6, 3.43 ERA)
Randy Wolf allowed a third-inning run after a leadoff walk, but otherwise shut down the Giants for eight strong innings and his eighth quality start in his past nine outings. The Dodgers have scored 32 runs in Wolf's past three wins and he now leads the staff in innings pitched. Wolf is 7-3 lifetime against the D-backs, 1-0 this year.
First baseman Brandon Allen, who was acquired from the White Sox last month, was expected to be called up when the rosters expand on Sept. 1, but the way he's swinging the bat, he may speed up that timetable. Allen hit another homer on Friday night for Reno and now has 12 in 124 at-bats since the trade. The D-backs envision Allen being their starting first baseman next season and have discussed sending him to the Arizona Fall League. ... After the first game of the series featured Mark Reynolds and Andre Ethier each getting hit with pitches, Hinch was asked if he expected more players hit to get hit. "Guys get hit every day so I wouldn't expect anything different this weekend," Hinch said. "If guys are getting too close to the plate or feeling too comfortable, pitchers are always trying to disrupt that."
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Official game notes
KTAR 620, KSUN 1400 (Español)
Monday: Diamondbacks (Max Scherzer, 7-6, 3.94) at Braves (Tommy Hanson, 7-2, 3.05), 1:05 p.m. MST
Tuesday: Diamondbacks (Jon Garland, 6-10, 4.28) at Phillies (Pedro Martinez, 1-0, 5.40), 4:05 p.m. MST
Wednesday: Diamondbacks (Dan Haren, 12-7, 2.50) at Phillies (Cliff Lee, 10-9, 2.86), 4:05 p.m. MST