CINCINNATI - The Reds expect to be without Jay Bruce for about a month after the right fielder had arthroscopic surgery Monday to repair the torn meniscus in his left knee.
The Reds also announced that outfielder Roger Bernadina has accepted an outright assignment to Class AAA Louisville. He was designated for assignment on Saturday.
The Reds said they will make a roster move to replace Bruce on Tuesday, when they will play the Red Sox in Boston.
Bruce was scratched from Sunday's lineup about two hours before the game.
Chris Heisey replaced him and went on to score the winning run in the Reds' 4-3 win over the Brewers at Great American Ball Park.
Bruce did manage to pinch-hit in the seventh inning, swinging and missing at three straight pitches from Milwaukee reliever Will Smith.
Bruce is hitting only .218 with three home runs and 14 RBIs in 29 games this season, but Bruce is considered one of the top left-handed sluggers in the National League.
He has played in no fewer than 148 games each year from 2010-13, hitting at least 30 home runs in each of the past three seasons, including a career-high 34 two years ago. He finished in the top 10 of NL MVP voting each of the past two seasons.
Bruce is also the Reds' only lefty with power aside from Joey Votto.
Price will likely replace Bruce in the starting lineup with Heisey who Fox Sports Ohio labeled "The People's Choice" because of his track record of coming through in the clutch and his versatility.
"He doesn't play every day, but he plays a lot because he is the team's fourth outfielder and he can play all three outfield positions with no drop in coverage or production at home plate."
In addition to his heroics on Sunday, the 29-year-old drove in what proved the winning run Tuesday night in a 3-2 win over the Chicago Cubs.
Heisey is hitting .255 with a home run, six RBIs and seven runs scored.
Expect recently activated utility man Skip Schumaker to receive playing time, as well.