The team needs to be at the 25-man limit by Opening Day. That means 11 more players will have to go over the final two weeks.
"It won't be terribly easy to get to 25 with this group. It was hard enough to send some of these guys out that we just sent to Minor League camp," Reds manager Bryan Price said.
Price had indicated early in camp that the team would likely want Suarez to get regular at-bats during the season. Acquired from the Tigers in the December trade for pitcher Alfredo Simon, Suarez was not expected to unseat incumbent shortstop Zack Cozart.
"We brought up Lutzy [the last two seasons] because he was a guy we had to have. He was on the roster, he was a guy who we felt could fill a certain void, but from a development standpoint was maybe not in his best interest. It'll be the same thing with Suarez," Price said. "We don't see him at this point in time as a utility player, so in order to keep his development progressing, organizationally we feel he needs to play every day and that opportunity is going to be in Louisville."
Mijares, who was signed to a Minor League deal in December, was the lone late arrival to camp after a travel issue from Venezuela. The lefty had a 5.06 ERA in his five spring games, with two of the six hits he allowed being home runs.
"Yeah, some pretty difficult decisions, and more awaiting us," Price said.
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.