Table:
text: 2013 Chicago Bears season
Offseason
Roster changes
Position_ Player Free_agency_tag Date_signed _2013_team_
QB Josh McCown UFA March 29 Chicago Bears
RB Kahlil Bell UFA August 11 New York Jets
OG Lance Louis UFA March 27 Miami Dolphins
OG Chris Spencer UFA April 1 Tennessee Titans
OG Chilo Rachal UFA April 10 Arizona Cardinals
OT Jonathan Scott UFA March 25 Chicago Bears
DE Israel Idonije UFA June 25 Detroit Lions
DT Amobi Okoye UFA – –
LB Geno Hayes UFA March 13 Jacksonville Jaguars
LB Nick Roach UFA March 15 Oakland Raiders
CB Zack Bowman UFA March 15 Chicago Bears
CB D. J. Moore UFA March 19 Carolina Panthers

text: 2013 Chicago Bears season
Offseason
Roster changes
Position_ Player Free_agency_tag Date_signed _2013_team_
S Troy Nolan UFA July 29 Tampa Bay Buccaneers
K Olindo Mare UFA – –

Question: According to this chart, what is the best-played position of the Chicago Bears in the 2013 season?

Question: How many free agents did this 2013 Chicago Bears team pick up this season?