Duno is on the 7-day injured list at Single-A Daytona with a broken rib, Carlos Collazo of Baseball America reports.
Per the report, Duno is rehabbing at the Reds' spring training complex and could return very late in the season. The 18-year-old catcher jumped over the Arizona Complex League and went straight from the Dominican Summer League to Single-A this season. He slashed .267/.367/.422 with three home runs and a 28.8 percent strikeout rate in 32 games before suffering the injury.