The former sixth-rounder slugged his first Cactus League homer against Cleveland on Wednesday and followed it up with a four-hit performance in the Padres' 8-2 victory over the Dodgers in Glendale, Ariz., on Thursday.
Simon Castro, a 6-foot-5 right-handed prospect, pitched a perfect inning to pick up his first win of the spring.
Rizzo went 4-for-5 with a pair of doubles, a run and an RBI, and he is 7-for-10 over his last four appearances. He collected just one single in his previous eight at-bats.
The 21-year-old struck out on three pitches in the second inning and led off the fourth with an opposite field single. He singled and stole second and third base in the sixth, and he pulled a two-out double into right field in the seventh.
Rizzo, originally selected by the Boston Red Sox in the 2007 First-Year Player Draft, completed his afternoon with an RBI double to left in the top of the ninth.
The left-hander batted .260 with 25 homers and 100 RBIs across two levels with Class A Advanced Salem and Double-A Portland in 2010 before being traded with Casey Kelly, Eric Patterson and Reymond Fuentes for slugger Adrian Gonzalez in December.
Castro entered in the fifth in relief of Wade LeBlanc, retiring Rod Barajas and Trayvon Robinson on fly balls and inducing veteran Rafael Furcal to pop up to shortstop.
It was Castro's first scoreless inning of the spring. He surrendered two runs on three hits and a walk in his debut against Kansas City and two runs -- one earned -- against the Cubs on Saturday.
Former third-round outfield prospect Cedric Hunter slugged a three-run homer off the bench. Jarrett Hoffpauir added a solo homer, his first of the spring, off Jonathan Broxton in the sixth.
For the Dodgers, hard-throwing second-rounder Stuart Pomeranz allowed one run over two-thirds of an inning and Scott Elbert worked around a one-out walk in the eighth to complete the scoreless inning.
Robinson, making the start in center field, went 0-for-2 to lower his spring average to .200.