Brower, a right-handed reliever, was competing for the final spot in the Reds' bullpen. The 35-year-old was signed to a Minor League contract in December 2007, and compiled a 9.82 ERA in 7 1/3 innings pitched.
Cabrera was signed to a Minor League contract by the Reds on March 3, and batted .296 with 14 RBIs this spring. A versatile player with Major League experience, Cabrera was vying for a position in the Reds' outfield.
Hairston was also signed to a Minor League contract on March 3. The 30-year-old has played 10 seasons in the Majors with the Orioles, Cubs and Rangers and batted .296 with six RBIs in this year's camp.
The Reds must reduce their roster to 25 before Monday's home opener vs. Arizona.
With Mike Stanton already told that he will not be on the team and catcher David Ross expected to start the season on the disabled list, the Reds will likely release one more pitcher before the season's start.
Brittany Ghiroli is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.