Vanek will wear the "C" for home games, while Ott will wear the "C" for road games. In addition, Christian Ehrhoff was named an alternate captain for all games.
"We just thought both guys represented what we wanted," Rolston said. "Nothing more, nothing less than that. It's all about the influence they have on the team. Those guys are big influences on the team. We thought that was the way to go."
Both players were flattered by the selection. Vanek, 29, has spent his entire career with the Sabres, starting with when the team made him the fifth pick of the 2003 NHL Draft. Vanek is sixth on the club's all-time list with 250 goals, and 10th with 488 points.
"Obviously it means a lot to be representing this great organization with Steve and Christian," Vanek said. "It's an honor, but as I've told the guys, this letter doesn't mean much if we don't do anything as a group."
"Thomas has been a big part of this organization for a long time," Rolston said. "He knows how it ticks. He wants to have a great year and he also has been really good in camp in helping our young guys develop, whether it's on the bench or in the room."
"It's a tremendous honor, the ultimate honor, to wear the 'C' for this team," said Ott.