CHARLOTTE, N.C. -- It didn’t take long for tight end Luke Stocker to get up to speed with the Vikings.

The 11-year veteran on Saturday was elevated to the active roster for Sunday’s game at Carolina just three days after he had signed Wednesday to the practice squad.

Stocker was needed after Ben Ellefson had been ruled out Friday with a knee injury suffered in last Sunday’s 19-17 win over Detroit. Vikings coach Mike Zimmer had indicated on Friday that Stocker could be elevated.

“He’s come on real quick as far as learning and understanding ... the playbook and plays that we may end up having for him,’’ Zimmer said. “So we’ll see.’’

The Vikings will have three tight ends in uniform on Sunday in starter Tyler Conklin and reserves Stocker and Chris Herndon.

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Stocker, 33, is the oldest offensive player on the Vikings. He previously played with Tampa Bay, Tennessee and Atlanta, and has 83 career catches for 693 yards.