49ers Respond to President's Concerns

Several San Francisco 49ers say they would have no problem if their sons played football, even though President Obama has questioned the safety of the game.

During an interview Monday at the Super Bowl, All-Pro linebacker Aldon Smith responded to a question about the president's comments by saying anyone involved in the sport knows the requirements. Smith says, "It's not like we signed up and thought we were going to play tennis."

Guard Alex Boone says football has to be "physical," and that if his children want to play, they can.

San Francisco coach Jim Harbaugh joked about allowing his son Jack, now 4 months old, to follow in his footsteps; Harbaugh was an NFL quarterback for 14 seasons.

"If President Obama feels that way, then (there will) be a little less competition for Jack Harbaugh when he gets older," the coach said.