Gomez left Saturday's 7-4 win over Colorado in the seventh with a neck strain after the collision. He said he was scared initially after the injury after feeling a tingling sensation throughout his body. He had a headache and sore neck, but passed a concussion test.
He was not in the starting lineup for Sunday's game but was available off the bench. He is batting .310 with 13 home runs and 44 RBIs this season.
Gomez also hurt his head Friday night after sliding headfirst into second and glancing off second baseman Josh Rutledge's leg.
"We have extra players, so we decided to have a day after I [got] hit twice in the head," Gomez said Sunday. "Everything is fine. The neck is OK."
The Brewers promoted Jeff Bianchi from Triple-A Nashville on Sunday to fortify their bench after injuries to Gomez and shortstop Jean Segura, who left Saturday's game in the sixth inning with leg cramps. Segura also was available off the bench.
Bianchi began the season in Milwaukee before being sent down last month. He was hitting .276 with three homers and 14 RBIs in the minors.
The Brewers were wrapping up a four-game series Sunday with the Rockies, which would also finish a stretch of 20 games without a day off.
Reliever Alfredo Figaro was sent to Nashville to make room for Bianchi and give Milwaukee a five-man bench again.
The Associated Press contributed to this report.