Minnesota Vikings vs. 49ers: 5 players to watch

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Sep 13, 2014; Miami, FL, USA; Pittsburgh Panthers offensive linesman T.J. Clemmings (68) takes a drink on the sidelines in the fourth quarter in a game against the FIU Golden Panthers at FIU Stadium. Pitt won 42-25. Mandatory Credit: Robert Mayer-USA TODAY Sports

1. T.J. Clemmings

Rookie right tackle Clemmings was thrust into starting duty after Phil Loadholt suffered a season-ending Achilles tendon tear in the second preseason game. Clemmings was a highly-regarded talent in college but slid in the draft due to concerns over a foot injury.

Clemmings seems to have more than enough talent to be a starter in the NFL, the question is how quickly he can learn his position and begin to gel with right guard Mike Harris, who is himself limited in starting experience.

The Vikings’ run game to the right was not particularly strong this preseason, and Clemmings did not grade out that well as a run blocker. Clemmings did seem to fare better in pass protection.

If Clemmings struggles early this season, the Vikings could go to newly-acquired lineman Jeremiah Sirles, who started at guard for San Diego last year but has tackle experience.

Next: A linebacker