1.   After his third concussion, he listened to his doctor and sat out the remainder of the season.

2.   It is the third concussion of his career. . . .

3.   Hillard quit the team after his third concussion.

4.   Hillard quit the team last month after his third concussion.

5.   Lindros returned to the ice last Tuesday for the first time since sustaining his third concussion of the year earlier this month.