concussion

Cavaliers rookie guard Kyrie Irving has a concussion and is being kept out of Cleveland's game against the Los Angeles Clippers.

Ask Jacksonville Jaguars running back Maurice Jones-Drew whether he would try to play through a concussion or yank himself from a game, and he'll provide a straightforward answer.

Sidney Crosby's concussion struggles have made big news, but an estimated 22 NHL players are currently sidelined by head injury.

Stu Hackel examines the league's nightmare.

Giroux was injured when he was kneed in the head by teammate by teammate Wayne Simmonds' during Saturday's 5-2 victory over the Tampa Bay Lightning.

The Detroit Lions have found a bit of bad luck. Running Back Mikel Leshoure was lost for the season due to an injury, and Jahvid Best has another concussion and may not play again this season.

Vick suffers a concussion and a loss at the hands of his former team.

Michael Vick has a concussion and the Eagles are 1-1. Matt Ryan led the Falcons to a 35-31 win that quieted doubts about Atlanta -- and raised some about Philly, writes Don Banks.

Eagles QB Michael Vick left with a third-quarter concussion, and Matt Ryan guided the Falcons to a pair of late touchdowns to hand the Super Bowl favorites a stunning 35-31 defeat.

Sidney Crosby 's agent said there's no timetable for the Pittsburgh Penguins star to return from a concussion , the clearest indication yet that he may not be ready when the NHL season begins in October.