Arredondo had some significant swelling in his arm on Sunday, and said the area was a little sensitive, but nothing to be overly concerned about.
"I'll be alright," Arredondo said. "It might just take a couple days."
Reds manager Dusty Baker said Arredondo will likely be unavailable for a few games, but is confident the club can get by with a well-rested bullpen.
"I imagine he'll be sore," Baker said. "I'm planning on him not being available. We are relatively whole now. We're in decent shape even without him."
The Reds used three more relievers after Arredondo's exit on Saturday.
Brewers shortstop Jeff Bianchi lined a ball straight back to Arredondo, who turned and deflected the ball with his forearm to Todd Frazier, who recorded the out at first.
The Reds' staff came out to examine Arredondo as he threw several precautionary pitches to test the arm and decided to leave him in the game.
Arredondo lasted one more batter, giving up a single to pinch-hitter Cesar Izturis, before the training staff reemerged from the dugout and the Reds replaced Arredondo with lefty Sean Marshall.
Arredondo pitched two-thirds of an inning, giving up one hit and striking out one.