Sims (elbow) said on his personal Twitter page on Monday that he had no concerns regarding his readiness for Opening Day.
Reds general manager Nick Krall said Monday that Sims would be delayed to start camp due to elbow tightness. The righty didn't deny those reports but said that the delay was purely precautionary. Players are typically rather optimistic about their own health, and even if Sims opens the season without an official injury designation, he will be at a high risk of re-injury.