CINCINNATI -- The Reds are turning to the arm of a rookie in hopes of fortifying their bullpen.
The team recalled right-hander Carlos Contreras from Class AA Pensacola on Saturday.
In order to make the move, the Reds designated for assignment versatile outfielder Roger Bernadina.
Bernadina previously was designated for assignment on May 3, when Skip Schumaker came off the disabled list. But he rejoined the team three days later when Jay Bruce went on the DL.
While Bernadina's versatility and athleticism was nice to have off the bench, the Reds are desperately in need of arms in the pen. The team has used six relievers in both of their last two games.
Contreras, 23, has spent the season with the Pensacola Blue Wahoos. He has a 2-1 record with a 2.70 ERA in 20 innings of work.
So far this season Contreras has pitched in nine games, including three starts, due to injuries. He was on the Blue Wahoos' disabled list from April 27 through June 2.
A strikeout pitcher, he's fanned 27 batters on the season, which is more than the total number of hits (15) and walks (11) he's allowed this season.
He last pitched in the ninth inning of Thursday's 7-2 win over Huntsville. He struck out one batter and threw only eight total pitches.
When he take the mound for the Reds, Contreras will make his Major League debut. Two other players have accomplished that feat for the Reds this season.
If he pitches in the next two days, he'll be the second relief pitcher to debut during the three-game series against the Blue Jays.
On Friday, right-handed reliever Jumbo Diaz made his debut Friday night against the Blue Jays.
Diaz, who was brought up when Sean Marshall was placed on the 60-day DL, was less than sharp in his lone inning of work. He allowed three runs on three hits, including two home runs, in the Reds' 14-9 loss to Toronto.
Catcher Tucker Barnhart made his debut April 3 against the St. Louis Cardinals.