Vernon Davis scuffling, team running gassers

Vernon Davis found out in a hurry that his old antics won't be tolerated with Mike Singletary running the San Francisco 49ers' show.

After the testy tight end scuffled—he won't call it a fight, rather just an act of being competitive—with linebacker Marques Harris during a recent practice, everybody paid. As in all the Niners running enough "gassers," 12 sprints across the width of the field, to make one pass out as Davis so put it.

The excitable Davis, a regular fighter during his first three NFL seasons, received a talking-to from Singletary. Star running back Frank Gore spoke up as well. The two have an amicable relationship.

"I wasn't mad about having to run gassers," Gore said Saturday. "I just feel it's his fourth year now, and I told him it shouldn't be him now. Everybody makes mistakes but it shouldn't be him. OK, a rookie, I accept that. It's his fourth year now, now it's time. It's time to be a man and try to do everything right. There are younger guys who probably look up to you on the team."

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