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8/1/2014 6:32 P.M. ET

Righty Gonzalez promoted to Triple-A

WASHINGTON -- The Phillies are finally seeing results on their $12 million investment in Miguel Alfredo Gonzalez.

The Cuban right-hander was promoted to Triple-A Lehigh Valley from Double-A Reading on Friday after going 0-2 with a 3.14 ERA over 14 1/3 innings in a bullpen role.

"He was ready for that move," Phillies manager Ryne Sandberg said.

The organization converted Gonzalez from a starter to a reliever because of issues with his throwing elbow, and the change has significantly aided the right-hander's development, especially in terms of velocity.

Sandberg said Gonzalez is throwing his fastball between 93-97 mph. In addition, he's polished his breaking ball and changeup to become a legitimate three-pitch threat.

The key now for Gonzalez will be encountering more two-inning outings, which are the type of situations the Phillies expect the 27-year-old to encounter in the Majors.

"It sounds like he's really there as far as all that goes [health-wise], " Sandberg said. "Now, it's more about experiencing. He's done back-to-back days, but just to get him ready to really be usable at this level would be his next step."

Team doctor to examine Lee's elbow today

WASHINGTON -- Phillies starter Cliff Lee will have his strained left elbow examined by team physician Dr. Steve Cohen on Saturday, according to manager Ryne Sandberg.

Lee surrendered one hit through his first 2 2/3 innings Thursday night against the Nationals, but after delivering one pitch to Denard Span, the left-hander gestured toward his throwing elbow in frustration and left the contest. He was placed on the 15-day disabled list with a left flexor pronator strain, the same injury that caused him to miss two months earlier this season.

Sandberg said any MRIs or further testing on Lee's elbow would occur in Philadelphia when the Phillies return home after the weekend series in Washington. A specific date for the testing will be determined after Cohen's evaluation.

In the meantime, the Phillies selected the contract of left-hander Cesar Jimenez to fill Lee's spot on the 25-man roster.

"He's been pitching well and he's a multiple-inning guy," Sandberg said of Jimenez, who is 3-2 with a 1.45 ERA in 38 appearances -- two of them starts -- for Triple-A Lehigh Valley.

When Lee was sidelined earlier in the season, right-hander David Buchanan took over his spot in the rotation, going 5-5 with 4.40 in 10 starts. But Buchanan was optioned to Lehigh Valley on July 10 to make room for Grady Sizemore.

Moving forward, Sandberg suggested Jimenez could serve as Lee's replacement for the remainder of the season instead of Buchanan.

"That's yet to be totally determined," Sandberg said. "But that's a pretty good candidate there [in Jimenez]. He pitched well [Thursday] night and he's right on schedule."

Worth noting

• Sandberg said there was a possibility of outfielder Domonic Brown returning to the starting lineup for Friday's game. However, Brown woke up sick Friday morning with a sore throat and a fever, keeping him out for the third straight day.

Jimmy Rollins and his wife, Johari, will prepare a "sweet treat" for Philadelphia area children Aug. 7, alongside nutritionist Ali Shapiaro as part of The Rollins Family Foundation's continued mission to provide fresh food and offer healthy eating habit tips to the community. The event will be held at the New Kensington CDC Garden Center from 11:30 a.m. to 1 p.m. ET.

Daniel Popper is an associate reporter for MLB.com. He also can be found on Twitter @danielrpopper. This story was not subject to the approval of Major League Baseball or its clubs.