"Pietersen brings his own energy to the team and his calmness rubs off on the other players. If you have a calm captain, you have a calm team as well," Parnell said after his side's six-wicket win over Mumbai Indians.
"Having confidence helps you and having the backing of the support staff and the captain is massive for any cricketer. Everyone wants to be backed by the leaders, and I feel I have that backing," he said.
"I was actually speaking to one of the owners the other day. He mentioned to me that the Delhi Daredevils play for the badge and not for themselves. As a collective bowling unit, we share information. The constant sharing of information between us helps us perform well as a unit," he said.
With three losses and two wins, Delhi are at the lower half of the IPL table but Parnell said that the team morale was still high after the win over Mumbai.