CINCINNATI -- Edinson Volquez was back in the Reds' clubhouse on Sunday morning and said he is ready for his return to the Majors later this week.

Volquez, Cincinnati's Opening Day starter who was demoted to Triple-A Louisville on May 23, stopped by Great American Ball Park before joining his teammates in Columbus later in the day. Volquez is 1-0 with a 1.88 ERA in two starts for the Bats, and all signs point to him starting Tuesday night's game against the Cubs.

Mike Leake, who was originally penciled in for Tuesday's start, will instead take the ball for Monday's opener, manager Dusty Baker said. Chad Reineke has been moved from being Monday's starter to Cincinnati's bullpen. Still, Baker won't guarantee a Volquez start on Tuesday, preferring to use qualifiers like "maybe" and "in theory."

When asked on Sunday what he was waiting for in announcing who would start the middle game of that three-game set, Baker replied, "Tuesday."

Volquez said he has regained his fastball command during his two-week stint in Louisville by making his motion more compact.

"I feel pretty good," said Volquez, who is 3-2 with a 6.35 ERA in 10 starts with the Reds this year. "My fastball command is better right now. I made a little adjustment with my delivery. ... It's kind of crazy, because it's a little thing."

Earlier this season, when Volquez would pivot his right leg toward third base at the beginning of his delivery, he would step about four feet toward first base with his left leg. As a result, he was frequently off balance, jeopardizing his control. Volquez said he has since refined the delivery, making his first step much shorter.

Reds have limited relief options on Sunday

CINCINNATI -- After using all of his relievers in Saturday's 11-inning loss, manager Dusty Baker's options against the Dodgers on Sunday are more limited. He will try to make up for a tired bullpen by moving starter Chad Reineke to a reliever role.

Baker said he will be holding Nick Masset and Logan Ondrusek out on Sunday because both righties have pitched two days in a row. On Saturday, Masset threw 10 pitches in a rough one-third of an inning, getting charged with three runs on three hits. Ondrusek pitched two-thirds of an inning, throwing 15 pitches and serving up a game-tying grand slam to Matt Kemp in the eighth.

Prior to appearing in Friday night's game, Ondrusek had last pitched on May 28. Two weeks ago, he complained of soreness after appearing in five games in six days.

Reineke made his Reds debut on Tuesday against the Brewers and took the loss after allowing six runs (five earned) on five hits in 6 1/3 innings.

"Hopefully, we'll get a deep game like we have the last couple of days," Baker said referring Sunday's starter Travis Wood. "That's what helps, big time."

Bronson Arroyo lasted six innings on Friday, and Johnny Cueto pitched seven innings on Saturday. Cueto's appearance appeared sufficient to earn the win and keep some bullpen arms fresh for Sunday, but the Dodgers spoiled that by plating five runs in the eighth to force extra innings.

"The sad part about yesterday's game is, it's hard to accept the fact that other teams have comeback ability like you do sometimes," Baker said. "It's OK when you do unto others, but not when they do unto you."

Renteria's back still barking

CINCINNATI -- Edgar Renteria is unavailable for a third day in a row with a stiff back. Renteria, 36, did not have much of an explanation for how the injury happened, and manager Dusty Baker said the shortstop just woke up feeling sore.

"On the off-day [Thursday], he was just lounging around and he came up stiff," Baker said. "It happens sometimes. He's better, though. [On Saturday], he could field a little bit and walk. He wasn't available to hit. Hopefully, he will be better within a couple days."

Renteria, who denied an interview request on Sunday, is coming off a rough May in which he hit just .180. He has also committed a team-high six errors, though part of the issue can be chalked up simply to his position. Fellow shortstop Paul Janish has committed the second most errors on the team with four, albeit in 116 more innings.

Renteria was the only position player who did not see action in Saturday's game.

Worth noting

• Aroldis Chapman will remain in Louisville for the immediate future. He's appeared in three games there and is 0-1 with a 13.50 ERA. Said manager Dusty Baker: "It is what it was. He's feeling great, physically, but there are a few things he's got to get together. For the sake of not having an answer, let's wait until we have an answer before you ask me again."

• Homer Bailey threw off a mound for the first time since going on the 15-day DL with a strained posterior capsule in his right shoulder. Bailey threw 25 pitches on Saturday, but said he does not expect to be fully ready until "a couple days" after his stint on the DL ends next Saturday.