"He had good velocity and good movement to his two-seamer," said Padres manager Bud Black of Cashner, who got nine ground-ball outs with the pitch. "He did a good job keeping the ball down with his two-seamer."
San Diego scored three runs off Rockies left-hander Franklin Morales in the second, as Alex Castellanos began the rally with a single in his first Padres at-bat since being claimed off waivers Thursday from the Rangers.
Jackson followed with a two-run homer to left, while catcher Rene Rivera doubled, advanced to third on Cashner's single and scored on a wild pitch.
"I threw a lot of strikes, made my pitches," Morales said. "Sometimes you miss your pitch, and that's when you get hit."
Padres catcher Yasmani Grandal was 1-for-2 in his Cactus League debut coming off last season's ACL injury, while first baseman/outfielder Tommy Medica continued his torrid spring by going 1-for-3.
The Rockies got two hits a piece from left fielder Carlos Gonzalez and third baseman Nolan Arenado, while first baseman Justin Morneau was 0-for-2 in his first action of the spring.
Up Next: Ian Kennedy will make his third start of the spring on Tuesday at 1:05 p.m. PT when the Padres host the A's at the Peoria Sports Complex. Kennedy has allowed two runs in five innings thus far, and he is expected to go four innings and/or throw about 60 pitches. Kennedy has worked closely with pitching coach Darren Balsley on creating more of a downhill plane with his delivery with hopes of helping him get back to the mechanics he had in 2011, when he won 21 games with the D-backs.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.