Freeman certainly looked comfortable in the role.
Freeman homered twice to drive in three runs, Tommy Hanson combined with two relievers on a four-hitter and Atlanta beat Colorado 4-1 on Monday night.
Freeman's two-run shot in the first inning drove in Brian McCann, who singled with two outs off Ubaldo Jimenez (3-8). Freeman hit his 11th homer in the eighth off Matt Reynolds for his first career two-homer game.
"He's been great," Gonzalez said. "For a 21-year-old young man, he's been able to compete in the major leagues, get better and help us win ballgames."
Jimenez was facing the Braves for the first time since throwing a no-hitter at Turner Field on April 17, 2010. It was the first no-hitter in Rockies history.
Freeman hit fourth -- McCann's normal spot -- for only the sixth time. Freeman has four homers and 11 RBIs in his last 11 games.
"It's just one of those things," Freeman said. "I feel like I'm doing the same thing."
Jones had a cortisone shot in his sore right knee on Sunday and might return on Tuesday.
Freeman, a left-handed hitter, said he was trying to go up the middle against Jimenez because "you don't want to try to pull a 96 mph two-seamer."
Freeman hit the first-inning homer to left-center and then pulled his second homer of the game to right.
"He had an unbelievable day," Hanson said.
Hanson (10-4) gave up one run on four hits and one walk in seven innings. He had six strikeouts while lowering his ERA to 2.52. He ranks among the league leaders in wins and ERA but wasn't selected to the NL All-Star team on Sunday.
When asked if he was motivated to show he deserved to be an All-Star, Hanson said, "Not at all."
"I just want to go out there and execute the game plan and worry about our team," he said.
Said Freeman: "He's an All-Star in all our books."
The Rockies were without outfielder Carlos Gonzalez, who bruised his right wrist when he ran into the center-field wall Sunday against Kansas City. X-rays showed no fracture, but Gonzalez said Monday he can't grip a bat.
Manager Jim Tracy said he wouldn't rule out Gonzalez playing Tuesday.
The Rockies lost another star player in the fourth when Troy Tulowitzki left with tightness in his right quadriceps.
Tulowitzki pulled up after grounding into a double play to end the fourth. He leaned over in apparent discomfort near first base before walking slowly off the field.
Tulowitzki said he felt the tightness about halfway down the first-base line. He said he has had problems with the quadriceps before and didn't want to risk a more serious injury.
"A game or three or four or whatever is better than months," Tulowitzki said.
Jonathan Herrera replaced Tulowitzki at shortstop.
The Braves pushed their lead to 3-1 in the sixth when McCann singled and scored on Jason Heyward's double to center. Herrera bobbled the relay throw from Ryan Spilborghs for an error, and Heyward was not awarded an RBI.
The Rockies had only two hits before Herrera singled with two outs in the seventh. He moved to third on Seth Smith's double past Freeman at first base, but Hanson ended the threat by striking out Ty Wigginton. The usually stoic Hanson slapped his glove on his way off the mound.
Rain started in the sixth inning and continued without an interruption of play.
The Rockies recalled OF Cole Garner from Triple-A Colorado Springs. Garner flied out as a pinch-hitter in the eighth in his first major league at-bat. ... RHP Clayton Mortensen was optioned to Colorado Springs. Mortensen was 2-4 with a 3.86 ERA in 16 games, including six starts, with the Rockies. ... Jordan Schafer had four strikeouts as Atlanta's leadoff hitter. ... Fredi Gonzalez said OF Martin Prado, recovering from a staph infection, may begin a minor league rehab assignment Tuesday or Wednesday.