Verdugo (1-1), a 2008 eighth-round Draft pick out of Louisiana State, allowed two hits and two walks while striking out five over three innings. He was followed by fellow Giants prospect Jason Stoffel and Orioles right-hander Pat Egan, who tossed a perfect frame apiece.
Wynn Pelzer (Orioles) pitched around three walks in a scoreless sixth and former first-round pick Rex Brothers (Rockies) gave up one hit over two frames before Cole Kimball (Nationals) allowed the Desert Dogs' only run on a pair of hits in the ninth.
Nationals prospect Derek Norris clubbed his second AFL homer, a solo shot in the fifth, after drawing a bases-loaded walk in the second.
D-backs outfield prospect Marc Krauss' two-run double in the first extended his RBI streak to six games. He leads the AFL with 14 RBIs in eight contests.
Top overall Draft pick Bryce Harper went 2-for-4 with a strikeout in his second AFL appearance. The heralded Nats prospect batted eighth as the Scorpions' designated hitter.
Phoenix starter Manuel Banuelos (0-1) was roughed up for five runs -- two earned -- on eight hits over four innings. The 19-year-old Yankees prospect fanned three and walked one.
A day after driving in four runs, Brandon Laird (Yankees) was the only Desert Dog with more than one hit. The Eastern League MVP and Rookie of the Year went 2-for-4 with a double to raise his average to .353.
Trayvon Robinson (Dodgers) drew a pair of walks but was picked off twice, once by the left-handed Verdugo and again by the right-handed Pelzer in the sixth. He stole 38 bases in 53 tries during the season at Double-A Chattanooga.
Phoenix (4-7) lost its second straight to fall four games behind the first-place Scorpions. The Desert Dogs have a league-low 96 hits in 11 games.
John Parker is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.