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9/2/2014 9:11 P.M. ET

Determined Brown gets first call to Giants

DENVER -- Gary Brown watched his brethren in the outfield, one by one, advance to the Major Leagues while he remained in the Minors. Roger Kieschnick. Francisco Peguero. Tyler Colvin. Juan Perez, several times. Even Double-A farmhand Jarrett Parker.

Yet Brown, who officially received his first callup from Triple-A Fresno on Tuesday, insisted that he never felt bitter when somebody else ascended to San Francisco.

"I'd be lying to myself if I said I should be the one to go, because obviously the numbers weren't there," said Brown, San Francisco's No. 1 selection (24th overall) in the 2010 First-Year Player Draft.

Brown didn't have overwhelming numbers this year, his second in a row with Fresno. But he improved his batting average from .231 in 2013 to .271, his on-base percentage from .286 to .329 and his slugging percentage from .375 to 394. Rated No. 20 on MLB.com's Giants Top 20 Prospects list, Brown also scored 89 runs and stole 36 bases, compared to 79 and 17 last year.

Brown, who turns 26 on Sept. 28, said he gained a better understanding of what it means to be consistent.

"I was trying to have the same mental approach every day," Brown said. "Sometimes I was up, sometimes I was down. But that was the area I was working on the most."

The Giants likely will use Brown as an occasional late-inning replacement and pinch-runner.

Morse may be out until Giants return home

DENVER -- Giants outfielder/first baseman Michael Morse could be sidelined through the rest of the club's two-city trip with a strained right oblique.

Manager Bruce Bochy called Morse's availability "questionable" for the three-game series at Detroit beginning Friday. Bochy expressed optimism about Morse's chances of returning to action when the Giants open a six-game homestand next Tuesday. "It's a really small area," Bochy said. But he added that the next day or two might indicate whether Morse will return sooner or later.

Morse underwent an MRI exam on Tuesday, which confirmed the nature of his injury.

Morse, 32, has appeared in 130 games, 16 shy of the career high he reached with Washington in 2011. He has started 125 games, including 82 in left field, 39 at first base and four as a designated hitter.

The right-handed hitter is batting .280 with 16 home runs, 61 RBIs and a .477 slugging percentage.

Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.