The statuses of the two injured sluggers are unknown for Saturday night's game against the visiting Arizona Diamondbacks.
After producing a combined 12 runs and 26 hits over the first three games, Milwaukee (1-3) got six singles and Jean Segura's first major league home run in a 3-1 loss to Arizona on Friday. Paul Goldschmidt and Jason Kubel scored the go-ahead runs for the Diamondbacks (3-1) on Michael Gonzalez's wild pitch in the seventh inning.
"Goldie took off. Nobody was really going for the ball," Kubel said. "So, I just kept going. Nobody was going for it. It was weird. Good thing for us it worked out."
Braun was scratched less than an hour before that game because of spasms on the right side of his neck, and Ramirez sprained his left knee in the fourth inning. Ramirez, who has a hit in each of the first four games, missed two weeks of spring training with a similar ailment and said this injury felt worse.
"We'll know more (Saturday)," Ramirez said. "I'll get an MRI (Saturday). We'll go from there. I don't want to assume anything."
Braun had at least one hit, one RBI and one run scored in each of his first three games.
"I've had a sore neck from sleeping, but not like this, not to the point where I can't move my neck," he told the team's official website.
"I think your depth is always challenged as a team, and we're going through one of those phases where, hopefully, other guys have a chance to step up, and need to step up."
While Braun and Ramirez try to get back in the lineup, Mike Fiers will look to get off to another strong start. After being called up from the minors May 29, the right-hander was 6-4 with a 1.82 ERA in his first 12 major league starts before going 3-6 with a 6.99 ERA over his final 10 outings.
Fiers learned he earned the last spot in the Brewers' rotation over Chris Narveson last Saturday.
"I just wanted to have a spot on the team, no matter where I was," Fiers said. "Wherever they thought I could help the team out the best was fine, and I think I can help out the team the best in the rotation. I'm glad they gave me another chance."
Fiers will oppose Patrick Corbin, who was 6-8 with a 4.54 ERA over three stints with Arizona in 2012. The left-hander beat out top prospect Tyler Skaggs and Randall Delgado for the final spot in the Diamondbacks' rotation.
Corbin will make his first start against the Brewers. During one of five relief appearances in 2012, he gave up the winning run in a 2-1 defeat at Miller Park on July 1.
Fiers allowed two hits and three walks while striking out 10 in a 10-2 victory over Arizona a day earlier.