In Harry Potter and Half-Blood Prince book is Harry Potter the quidditch captain?

Yes, Harry is the Gryffindor Quidditch Captain in HBP. In the book, there is the chapter when he is trying out all the players and it turns into a total riot, but he gets himself a great team! The first game against Slytherin was a success( the picture I added, is of the after-party in Gryffindor's common room.)He also gats himself a detention during the final match against Ravenclaw, but the team ends up winning, and wins the Quidditch Cup, placing number one for that year. It was the only mwaka Harry served as Quidditch Captain, as he wasn't at school the following year.