Vikings rookie quarterback Christian Ponder and an estimated 10 to 15 teammates will hold a voluntary three-day "minicamp" beginning Tuesday at the IMG Madden Football Academy in Bradenton, Fla. Ponder will be joined by the Vikings' two other roster quarterbacks, Joe Webb and Rhett Bomar under the supervision of former NFL quarterback Chris Weinke. Webb and Ponder have been working privately with Weinke during the past two weeks, much of it focused on learning the terminology and concepts of the new Vikings offensive playbook.