Table:
text: 2009 Pittsburgh Steelers season
2009 NFL Draft
2009 Pittsburgh Steelers Draft Selections
Round Pick_ Player Position_ Height Weight College Status_
5 168 Burnett, Joe Joe Burnett Cornerback ft9in (m) lb (kg) Central Florida Made 53-man roster at start of 2009 season
5 169 Summers, Frank Frank Summers Running back ft10in (m) lb (kg) UNLV Made 53-man roster at start of 2009 season
7 226 Shipley, A.Q. A.Q. Shipley Center ft1in (m) lb (kg) Penn State Signed to Practice Squad at start of 2009 season

text: 2009 Pittsburgh Steelers season
2009 NFL Draft
2009 Pittsburgh Steelers Draft Selections
Round Pick_ Player Position_ Height Weight College Status_
1 32 Hood, Evander Ziggy Hood Defensive tackle ft3in (m) lb (kg) Missouri Made 53-man roster at start of 2009 season
3 79 Urbik, Kraig Kraig Urbik Offensive guard ft6in (m) lb (kg) Wisconsin Made 53-man roster at start of 2009 season
3 84 Wallace, Mike Mike Wallace Wide Receiver ft0in (m) lb (kg) Mississippi Made 53-man roster at start of 2009 season
3 96 Lewis, Keenan Keenan Lewis Cornerback ft1in (m) lb (kg) Oregon State Made 53-man roster at start of 2009 season

Question: How many players played running back under the 2009 Pittsburgh Steelers, where status was set at 53 men at the start of the 2009 season?