With the expanded rosters, Cincinnati has an 11-man bullpen. How some of the rookies will be worked into service remains to be seen.
"I've got my eyes open on how guys are handling this or paying attention and working hard, if they throw strikes in the 'pen and their background and record," Reds manager Dusty Baker said. "We are not here for no tryout camp. We're here to win the pennant. We haven't won the pennant yet."
Cingrani, a fast rising prospect in the system, was 10-4 with a 1.73 ERA in 26 games, including 25 starts, for Pensacola and Class A Bakersfield. His ERA was second-lowest among all Minor League pitchers with at least 100 innings.
Villarreal began the season at Pensacola before his May promotion to Louisville. Combined, he was 4-14 with a 4.36 ERA in 26 starts over 148 2/3 innings.
This is Redmond's fourth big league promotion of the season. His lone appearance for the Reds came when he started the second game of an Aug. 18 doubleheader against the Cubs. Redmond lasted only 3 1/3 innings and allowed four runs and seven hits with five walks.
To clear space on the 40-man roster, the Reds sent outright to Louisville infielder Chris Valaika and reliever Jordan Smith. Both have big league experience with Cincinnati, but neither were called up in 2012. Valaika batted only .223 in 85 games, while Smith was 3-3 with a 4.61 ERA and 13 saves in 51 games for the Bats.