Offensive tackle Tarik Glenn will not be back to help the Indianapolis Colts defend their Super Bowl title, according to several people close to the 10-year veteran, choosing instead to retire. None of Glenn's teammates would confirm the decision publicly, and repeated attempts to reach Glenn were unsuccessful. When asked to comment on his client's decision, agent Ralph Cindrich said any response would have to come from Glenn. Colts coach Tony Dungy said earlier this week he recently talked with Glenn but would not divulge the nature of the discussions. "Probably the best person to speak to on that is him," Dungy said. Barring a change of heart by Glenn, 31, the Colts will report to training camp July 29 without their second-longest tenured player, and one who has appeared in the past three Pro Bowls. The Colts selected Glenn with the 19th overall pick in the 1997 draft. Only Marvin Harrison, the team's 1996 first-round draft pick, has been around longer.