Jagga Jasoos #7

Jagga Jasoos was currently visiting Australia for spending time with his friend Darren Lehmann. They both had met during world cup 2007, when Bob Woolmer was murdered. Jagga Jasoos was theere for investigation purposes. This time, Lehmann was serving as the coach of Australian cricket team. Lehmann had asked all the team players to remain present at the dinner as his friend was coming to visit him. Being asked about his friend, Lehmann told that Jagga Jasoos is a famous detective, who is able to solve any murder or theft cases within moments of time. When, Lehmann told them about hundred percent success rate of Jagga Jasoos, no one was ready to accept this fact. So, three of those team members decided to test Jagga Jasoos on the dinner. These three include, Clarke, Warner and Lee. What these three did, they stole bat, a stump and helmet of their coach Lehmann.
At the time of dinner, Jagga Jasoos arrived on time. There, Darren Lehmann was looking sad as three of his items were stolen by his own team players. Lehmann knew that these items were stolen by three players - Warner, Clarke and Lee. Plus, Lehmann told Jagga Jasoos that each of these three had stolen a single item. Jagga came across these three players for investigation.
Clarke said, "Warner had stolen bat."
Lee said, "Warner had stolen helmet."
Warner said, "They both were lying."

Now, Watson, being a team player and well aware of these three persons' nature, decided to help Jagga Jasoos. Watson told Jagga Jasoos, "The person who stole a stump is lying.  And the other two are speaking complete truth."
Jagga Jasoos, with the help of this clue, was able to tell what each of these three players had stolen. How can Jagga Jasoos surely tell about complete theft process, just with the help of these statements?
Put yourself into this task and tell the answers about the whole theft process.
I will wait for your answers. As you all know, there is a competition going on, I ask you all to mail me your answers. So, no one gets an extra advantage. You can also mail me to know the correct answers.
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