ESPN's Adam Schefter reports that Indianapolis Colts center Jeff Saturday underwent arthroscopic knee surgery today.

Saturday, 35, is expected to miss a couple of weeks of pre-season games, Schefter adds.

Mike Pollak and Jamey Richard, a pair of 2008 draft picks, can play center, as could 2010 fourth-round pick Jacques McClendon. Rookie free agent Adrian Martinez, a waiver-wire claim from the Seattle Seahawks on Tuesday, adds depth at the pivot, as well.