The Kansas City Chiefs are opening up Monday's practice with one goal in mind: beating the San Diego Chargers in the first regular season game.

The Chiefs opened practice with Casey Wiegmann taking first team duties, according to the Kansas City Star.

As we talked about earlier Monday morning, Rudy Niswanger has taken the majority of first team duties at center. The Chiefs kept both players during the roster cut down to 53 players.

This training camp I've been trying to figure out: Is Niswanger getting the first team snaps because he's better or because Wiegmann doesn't need as many snaps since he's a 15-year veteran?

Adam Teicher of the Kansas City Star reports that it was also Derrick Johnson and Jovan Belcher as the first team inside linebackers in the opening minutes of practice he was able to view.

Tamba Hali is also back after taking off last week and Ryan O'Callaghan is out once again.

Here's Josh Looney of KCChiefs.com's practice report from Monday.