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05/01/2013 9:37 PM ET

Machi, Rosario combine for rare back-to-back feat

PHOENIX -- The first career victories recorded on back-to-back nights by Jean Machi and Sandy Rosario on Monday and Tuesday, respectively, were definitely a rare event.

The Elias Sports Bureau found that the last instance of Giants pitchers posting their initial wins consecutively was Sept. 27-28, 1975, when Rob Dressler and Greg Minton received the respective decisions.

Minton developed into San Francisco's primary closer from 1980-84. Dressler's most extensive experience as a Giant came in 1976, when he finished 3-10 in 25 games, including 19 starts. One of his victories that year was a six-inning effort against Atlanta on July 4 -- the date of the nation's bicentennial celebration.

Rosario likely will return to Triple-A Fresno either when Jeremy Affeldt is activated from the disabled list or when Jose Mijares' bereavement leave ends.

Machi, who entered Wednesday with 6 2/3 scoreless innings over four appearances with the Giants, could be a keeper. Yet Machi spent nearly 13 years in the Minor Leagues with five organizations before he made his big league debut with the Giants last September.

Said Affeldt: "I don't know who missed on the guy or what, but when you have that kind of stuff ... I didn't see him before he came to us, so I don't know if he fixed some stuff or what. But what he's throwing is pretty good. It's tough to hit mid-90s with a split-finger, and [with] as much movement as he's getting with it."

Affeldt upbeat after completing final step in recovery

TEMPE, Ariz. -- A 25-pitch appearance in an extended spring game was only part of Jeremy Affeldt's extensive throwing regimen Wednesday morning.

Affeldt's outing against Angels farmhands was expected to be the final step in his recovery from a strained right oblique. Assuming he continues to feel comfortable -- the next day is always a critical period -- the left-hander likely will be activated from the disabled list before Friday's series opener against the Los Angeles Dodgers at AT&T Park.

"Overall, it was good," Affeldt said. "I could have been a little more aggressive. But sometimes in those situations it's tough to feel the same aggression that you do [in a game]."

Affeldt certainly underwent an aggressive throwing program, however. He limbered up his arm with long toss, warmed up in the bullpen and pitched in the game before playing more long toss. "I put as much pressure as I possibly could on it, and it was fine," he said.

Assistant athletic trainer Anthony Reyes and strength and conditioning coach Carl Kochan were present to supervise Affeldt. Neither general manager Brian Sabean nor any of his top assistants appeared to be on hand, perhaps reflecting the organization's confidence in Affeldt's health.

In the game, Affeldt faced seven batters and allowed two singles, neither of which was hit particularly hard. He coaxed four groundouts and recorded a strikeout.

Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.