The last thing an NFL team wants in minicamp is a serious injury to a prominent player. But that's not the only thing that can cast a cloud over a club's summer.
There's also the specter of contract kerfuffles. Holdouts by star players.
Sometimes, it's a young player who wants a big payday before his rookie deal runs out. Other times it's a veteran looking for one more payday or a change of scenery. Or a star balking at playing under the franchise tag.
More often than not, minicamp holdouts are much ado about nothing—either the player gets the deal he seeks or caves in and reports.