Senzel hasn't played for Double-A Pensacola since Thursday due to an illness, Zach Buchanan of the Cincinnati Enquirer reports.
The Reds haven't moved Senzel to the 7-day disabled list as a result of the issue, so it's not expected that he'll be sidelined for much longer. Senzel, who is regarded as one of the top position prospects in the Cincinnati system, looks ready for a tougher challenge after slashing .340/.413/.560 in the Southern League since receiving a promotion from High-A Daytona in June. However, since Senzel isn't on the 40-man roster and the non-contending Reds aren't eager to start his MLB service clock, don't count on the 22-year-old to receive a September callup.